Yeah. Thank you, CJ. So let me first talk about gross margin for EUV and then give you the wider picture on gross margin. So on EUV, what we said, as you know last year on the systems side, systems gross margin for EUV, we're looking at about 30%. This year we're looking at about 40%, 4-0. So that's what we have in the plan, and that's what we're executing for and that's also in our models for this year. On the wider picture for gross margin and I know that many of you are looking at the Capital Markets Day, at the Capital Markets Day we mentioned 50%. So let me start there, let me start at the 50% and let's look at what the circumstances were at the time, what the circumstances are today and then we will start talking about how we see this unfold and what the potential is that we see for this year. So back in November, at the Capital Markets Day in November 2018 I think there are three things that we should bear in mind. First off, at that stage what we modeled at that stage for you and that had the 50% in there was what we called a mid-market growth scenario. And I think in all likelihood if we look at the circumstances today, if we look at the circumstances of the Memory market today, then I think it will be hard to say that for the full year, we're looking at a mid-market scenario. It's is definitely not what we're looking at today depending on when it's going to come back. And as Peter said how it's going to come back. You could still on average, see a mid-market scenario, but at this stage, I think it's hard to say that we're looking at a mid-market scenario for that at this stage the Memory market in these months is fairly flat. So that's one important circumstance, I think to recognize. The second thing that I think changed from November 2018, and I think Peter already responded to that in the first question is the multi-beam. So the delay in the multi-beam, where I think we're going to see commercial application and commercial sales of multi-beam only in 2021, where at the Capital Markets Day, as you know, and as we already told you also last year, we were still looking at for 2020 as commercial application of multi-beam. So that's in essence shifted with a little under 1 year. So that's the second sort of thing to bear in mind. The third thing that deviates a little bit from what we told you in the Capital Markets Day in November 2018 is a bit of accounting issue and that has to do with the High-NA. We are preparing for High-NA not just on the R&D side, but we're also preparing for High-NA on the manufacturing side and on the supply chain side and we are incurring cost there that we cannot capitalize and have to run through cost of sales, which is a bit weird because we're not selling High-NA but nonetheless, that's what the accounting rules dictate you to do and that represents a little short of 1% alone in gross margins. So those are three things to bear in mind that might be different from the perspective and the model that existed in November 2018. So now let's look at this year and let's look at the 46% to 47% that we have for Q1 and let's look at the potential for the rest of the year. I think there is a number of drivers in there that I think could further drive the gross margin up. The first one obviously is related to the situation in the memory market and that is pretty important, not just for the top line, but it's also very important for gross margin because if we see a solid recovery in the second half of the Memory market that will have a significant impact on the sale of immersion tools, which as all of you know comes with pretty high gross margin and also with a good recovery in our voltage contrast business, which as you know, is also very much tied to the Memory business, and again, that is a very high margin product that we have. So if we get the recovery in the memory market that will also have a significant impact on the gross margin on those two elements alone. The second element that will -- that is expected to further drive up the gross margin throughout the year is the EUV service. EUV service for the full year is still expected to be -- to have negative gross margin. But over the quarter-over-quarter, you will see a sustained improvement in the gross margin that we have on EUV service, for two reasons. First off, because as you know, with the number of customers, we have the pay per wafer model and to the extent that EUV continues to go into high volume manufacturing, obviously we got more revenue. And secondly, the cost that we have per EUV machine goes down because we get more efficient in doing it. And we also get scale effects as a result of that. So quarter-over-quarter, you will see that the EUV service margin will improve. For the full year, it's still negative, but at least in Q4, maybe even a little before that we will see it as it starts to become a positive. A third improvement that we expect to occur in the course of this year will be the introduction of our new emerging tool. The 2050, NXE:2050 which again comes with a good improvement of our gross margin. So those are three significant drivers that we have that we believe give us a good shot at achieving a significant improvement of our gross margin, particularly in the second half and a good shot at the 50%. And then this 50% we will be able to then sustain further into 2021 which as Peter already alluded to, we think is going to be a very busy year, and a very busy year at that stage, would also come with a number of scale benefits in our gross margin and better fixed cost coverage. And also in 2021, we would see the introduction of a successor to EUV that would also again come with gross margin improvement. So then we think the momentum that would be created in the second half around reaching the 50% would then be further sustained and elaborated on in the 2021 time frame.