Yes. So the bigger picture is that our goals, and I think I've said this in our previous calls, our goal is to expand margins roughly 50 basis points here. That's what we wanted to do. So it's important you understand that. And I think we achieved that. We achieved a 50 basis point margin expansion 2017. And if you run the math and the guidance we have given you, we will be roughly in that ZIP code of margin expansion for 2018. Now obviously, mix plays a factor in both businesses. You've got -- in 2017, the Performance Solutions business saw a faster growth in the industrial business. I mean, the industrial business was a very strong grower for us in 2017. The Alpha business, which, as you know, has a high metal content was also a faster-growing business. If you actually remove the effect of Alpha's metal business and the pass-through, our margins are roughly flat in Performance, despite the industrial business being higher. In 2018, we fully expect that the core electronics business, that didn't grow as fast as Alpha or industrial, will be a big driver of the growth. And that -- and the margin of that business segment is significantly higher. So we expect that the mix will improve in 2018. We have cost reduction initiatives, as Scot talked about. And we fully expect that his business will again see a margin -- year-over-year margin expansion about 50 basis points. I would echo the same thing for the Ag business. The Ag business actually has put in place -- I think there are several things that are driving margin expansion in Ag. One, we are expanding in certain territories in Europe, as we have talked about. Those territories have higher-value crops and so, we get higher prices and we get higher margins. Second, our biosolutions business is growing roughly 15%, 20% a year, and that's also a very high-margin business. We fully understand that we have some generic pressures in some of our products. We are absolutely aware of that. We have been working with our supplier base to get concessions, so we can offset some of that pressure, which we did quite successfully 2017. So there are puts and takes, but I would say, again, at a high level, our plans are all drawn, so that we can continue to expand margin about 50 basis points every year.