A projectile fired with unknown initial velocity lands 212

Question

Compute all parts of given question:

Question: A projectile, fired with unknown initial velocity, lands 21.2 s later on the side of a hill, 2760 m away horizontally and 435 m vertically above its starting point. (Ignore any effects due to air resistance.)

Part A: What is the vertical component of its initial velocity?

m/s

Part B: What is the horizontal component of its initial velocity?

m/s

Part C: What was its maximum height above its launch point?

m

Part D: As it hit the hill, what speed did it have and what angle did its velocity make with the vertical?

Please show your work, so I can understand process. Thanks!