Opening the paper…
2 mA current source with 2 ohm and 5 ohm resistors feeding a resistive network, statement that I is -2 mA Current versus voltage graph for resistors P and Q, statement that resistance of Q is 5 kilo-ohm Two 6 V, 5 Ah batteries are connected in series. It will provide a total voltage magnitude of 12 V and a capacity of 30 Ah.