In the circuit of the the switch '$\text{S}$' has remained open for a long time. The switch closes instantaneously at $t=0$
- Find $V_{0}$ for $t \leq 0$ and as $t \rightarrow \infty$
- Write an expression for $V_{0}$ as function of time for $0 \leq t \leq \infty$
- Evaluate $\mathrm{V}_{0}$ at $t=25 \; \mu \mathrm{sec}$.