7.55 The switch in the circuit seen in Fig. P7.55 has been in position a for a long time. At t = 0, the switch MULTISIM moves instantaneously to position b. Find vo(t) and io(t) for t≥ 0+. Figure P7.55 2} \io (1) 30 ΚΩΣ 10 mA (1) 20 ΚΩ + 15 mA 50 ΚΩ Σ (t). 16 nF t=0 b/ a