Consider the first order circuit with following parameters: Is = 0.5 A, R = 100, R = 20 N, R3 = 40 M, L = 0.4 H. The switch is closed at time t=0. During t 0), reduce the linear circuit to the left of terminal a & b to its Thevenin equivalence. Evaluate the absolute value of the Thevenin voltage Vth (Q2) and Thevenin resistance Rth (Q3). (c) Calculate the time constant of the first order circuit during t>0. (Q4) (d) Calculate the value of io when t . (Q5) (e) Calculate the absolute value of io at time t = 4 ms. (Q6) (f) Calculate the absolute value of Vab at time t = 4 ms. (Q7)