$10.$ The switch S$1$ in the circuit in Fig. $6$ is closed at $\backslash ($ t$=0\backslash )$ and the switch S $2$ is closed at $\backslash (\backslash$mathrm$\{$t$\}=\backslash )0\mathrm{.}12$ s $.$ Both switches are ideal. $($i$)$ Find the current in the inductance as a function of time and plot it$.($ii$)$ Find the voltage across the inductance and plot it$.($iii$)$ Find the voltage across the first resistor and plot it$.($iv$)$ What is the time required to attain $\backslash (90\backslash \%\backslash )$ of the final steady$-$state value of current?