32. In the following circuit (Figure 16), $R_1 = 100\Omega$, $R_2 = 200\Omega$, $L = 10mH$, $I_s = 0.1A$. Assume the switch has been open for a long time and the switch closes at $t = 0 sec$. Use the Norton Equivalent Circuit method to solve for the equivalent parallel RL circuit. Find the $R_{th}$, $I_{sc}$ and time constant. If the switch is closed at $t > 0$, determine the value $I_L$ at $t = 0.1ms$.