An RL circuit in which L = 4.00 H and R = 5.00 is connected to a

Question:

An RL circuit in which L = 4.00 H and R = 5.00 Ω is connected to a 22.0-V battery at t = 0.
(a) What energy is stored in the inductor when the current is 0.500 A?
(b) At what rate is energy being stored in the inductor when I = 1.00 A?
(c) What power is being delivered to the circuit by the battery when I = 0.500 A?