Q:$2($BU$1)$ Consider a $480\frac{V}{240}V$ single$-$phase transformer with $R_C=1000$;$x_m=800$;$R_{eq}=3$;$x_{eq}=4$; and $n=2.$ The currents are known to be $I_1=7+9i,$A and $I_p=6\mathrm{.}52+9\mathrm{.}60iA$ in case of $V_1=480V.$ How much must be the load power $P_L?$