$7\mathrm{.}61($ PSPICE $)/($ MULTISTM $)$ The switch in the circuit shown in Fig. P $7\mathrm{.}61$

has been in the off position for a long time. At t$=0,$ the switch

moves instantaneously to the on position. Find v$\_($o$)($t$)$ for t$>=0.$

Figure P$7\mathrm{.}61$