Compute all parts of given question:
Question: A student throws a set of keys vertically upward to her sorority sister, who is in a window 2.10 m above. The second student catches the keys 1.40 s later.
Part A: With what initial velocity were the keys thrown?
Part B: What was the velocity of the keys just before they were caught?
I need help to compute the velocity of the keys just before they were caught.