Plz solve with answer clearly

The displacement s (in m) of an object is given by the following function of time t (in s). s(t) = 212 + 4t Find the object's acceleration when t - 2. When t= 2, the acceleration is | m/s (Simplify your answer.) The potential V (in volts) of a certain electric charge is given by the equation below where t is the time (in s). Find V= 2 (t +9) 12V volts/sec2