please help me with this

1. An object with mass m moves verticallyr under constant gravitational force through a medium that exerts a resistance 1with magnitude proportional to the speed of the object. Assume that the initial velocityF is 1:0 and the initial altitude is 1;\". A) Find the velocity of the object as a function of t E) Find the terminal velocityF (i.e., an; u(t)). C] Find y{t), where y(t) represents the altitude of the object at an};r time t