Given s(t) = 12 + 2t, find (a) v(t). (b) a(t). (c) the velocity and acceleration when t = 2. (a) v(t) = (b) a(t) (c) When t= 2, the velocity is feet per second. (Simplify your answer.) When t= 2, the acceleration is feet per second squared. (Simplify your answer.)