Q$4)$ A single$-$phase $50-$kVA, $1200/120-$volt, $60-$Hz distribution transformer is used as a step$-$down transformer at the load end of a $1200-$volt feeder whose series impedance is given below. $(40$ points$)120<01200$:$120$ The load at a $0\mathrm{.}90$ power factor lagging and at a rated secondary voltage. Neglecting the transformer exciting current, determine: $($a$)$ Determine the voltage $,,($b$)$ Determine the voltage $($c$)$ Calculate the P and Q power delivered to the sending end of the feeder