A step$-$up transformer is designed to have an output volt$-$ age of $2200$ V $($rms$)$ when the primary is connected across a $110-$V $($rms$)$ source. $($a$)$ If the primary winding has $80$ turns, how many turns are required on the second$-$ ary? $($b$)$ If a load resistor across the secondary draws a current of $1\mathrm{.}50$ A$,$ what is the current in the primary, assuming ideal conditions? $($c$)$ What If$?$ If the transformer actually has an efficiency of $95\mathrm{.}0\%,$ what is the current in the primary when the secondary current is $1\mathrm{.}20$ A$?$