a rock is thrown vertically upward fom the surface of the moon at a velocity of 24m/s(about 86km/h)reaches a height of s=24t-0.8t^2meters in t seconds. (a)find the rocks velocity and acceleration as functions of time?(accleration of gravity on the moon) (b)how long did it take the rock to reach its highest point? (c)how high did the rock go? (d)when did the rock reach half its maximum height? (e)how long was the rock aloft?