$9$U$.$ A $40$ resistor, a $5$ mH inductor and a $1\mathrm{.}25$ uF capacitor are connected in series. The series$-$connected elements are energized by a sinusoidal voltage source whose voltage is $600$ sin$(8000$t $+110$o $)$ V$.$ a$)$ Draw the frequency$-$domain equivalent circuit. b$)$ Reference the current in the direction of the voltage rise across the source, and find the phasor current. c$)$ Find the steady state expression for i$($t$).$