A copper wire wrapped into a coil is hooked to a 3.00V battery and a switch. At t=0 the switch S is closed. At t=20 seconds the current in the circuit is 24mA. After a long time the current in the circuit is 50mA. a. Find the resistance of the coil. b. Find the inductance of the coil. c. Find the energy stored in the coil when the current is maximum.