A stone is dropped from a 50ft high building note that the a

A stone is dropped from a 50ft high building. (note that the acceleration due to gravity near the surface of the earth is approximately -32 ft/sec ^2.)

a.) find, as a function of time, its velocity function v(t).
b.) find, as a function of time, its position function s(t).
c.) find the velocity of the object after one second.
d.) find the position of the object after one second.
e.) find the time at which the stone hits the ground.

Please show your work.