$9\mathrm{.}13.$Consider the vapor compression refrigeration cycle of Fig. $9\mathrm{.}1$with tetrafluoroethane as a refrigerant $($Table $9\mathrm{.}1,$Fig$.$G$\mathrm{.}2).$If the evaporation temperature is $10($F$),$show the effect of condensation temperature on the coefficient of performance by making calculations for condensation temperatures of $60,80,$and $100($F$).$

$($a$)$Assume isentropic compression of the vapor.

$($b$)$Assume a compressor efficiency of $75\%.$

Please use the Smith and Van ness $7$th Edition Book and show the interpolation.