A coil has an ohmic resistance of 280 Ω and a self-inductance coefficient of 668.5 mH. The current through the coil is 0.6 A and f = 50 Hz. Calculate:
a) the absorbed power
b) the apparent power
c) the reactive power
d) the reactive current

(This level corresponds to the early college years for students studying subjects like physics or electrical engineering)​