Yeah. Thanks for the question. On the first part, the whole Chegg business model is predicated on building a giant brand which we are very far ahead on, building a funnel, low-cost funnel, where I think we said today over 80% of our traffic is organic, and then building the student graph similar to the way Facebook has built its social graph and LinkedIn has built its professional graph. Because most of you don't get a chance to use the Chegg system, you're not familiar yet with the fact that it acts much the same way. So when a student comes in to the Chegg ecosystem, we know your college, we know your class, then we know your books, then we can guess your major. We can start to bring you Chegg Study when it's appropriate, particularly when you're using an eTextbook. When you're using an eTextbook, we not only know what book you're reading, we know when you're reading it, we know what page you're on. So the first part of the ecosystem was to build Chegg Study, which is just really having a phenomenal beginning of the year. And then after the acquisition of InstaEDU, the integration of building InstaEDU into Chegg Study as well as the rest of the ecosystem. So this is what we expected in terms of how we plan to build the Company, which is giant brand and giant reach, very inexpensive funnel. And then the internal funnel, leveraging the student graph, which we're really only at the beginning of, and yet it's still performing extraordinarily well. So we see tremendous momentum in Chegg Study. That generates additional great momentum into Chegg Tutors. And really we only have currently three subscription businesses, eTextbooks, Chegg Study and Chegg Tutors. And so they are already the ones generating that much graph [ph]. So we think those markets are huge and we think there'll be more opportunities like that, which leads to your second question which is about M&A. So we think LinkedIn's acquisition of Lynda sort of endorses our model, which is build a big brand, find the right customers, and find more things for those right customers within your network. We have always been very judicious about what we buy, so, you know, we really haven't done anything since I think internships last October and Tutors last June. So this is all organic for us because internships came with no revenue and Tutors had almost none originally [ph] last June, but is seeing incredible momentum. So we see -- as we see more opportunities like that where we can leverage our reach, leverage our ability to use our data to match more efficiently, take marketing costs out of any company buy, and generate such high-growth profit margin, then we will certainly look at those things. But like anybody else, we want to make sure they're the right things for the students and at the right price that we think get returns for our shareholders.