Invited to interview for summer internship with Optum Advisory team - nature of role?

I applied in December for a position as a summer intern for the Optum Advisory team (..../jobs/view/4049633230/ on LinkedIn). Required qualifications listed include experience with at least one of the following: Excel, R, Python, SQL, SAS. A general description of the activities involved includes 'forecasting trends' and providing reports to assist with managerial decision-making.

I have been invited to an interview for this position. Before I go in, I would like to know as much as I can about what day-to-day work would look like, what skills would be worth developing for the role if I were accepted, and so on. If anyone has any insight on the role, especially if they have had experience working within the Optum Advisory team, I would greatly appreciate it.

Thank you.