7. Calculate the output voltage vo(t) of series RC circuit shown in Fig. 2 if the initial current i(0) = 0. Assume the switch is at “n2” node from 2 to 3 sec and at “n1” node for the rest of the time. (Let V0 = 10 V, R = 2.5 × 105 Ω, and C = 10−6 pF) (10%)