A rocket carrying a satellite is accelerating straight up from the Earth's surface. At 1.15 s after

A rocket carrying a satellite is accelerating straight up from the Earth's surface. • At 1.15 s after liftoff, the rocket clears the top of its launch platform, which is 63 m above the ground. • After an additional 4.75 s, the rocket is 1.00 km above the ground. Calculate the magnitude of the average velocity of the rocket for: (a) The 4.75-s part of its flight. (b) The first 5.90 s of its flight.