Air having the flow rate of $0\mathrm{.}75$kg$/$s is compressed to $500$ kpa by revesible compressor and then cooled to $30\%$ by constant pressure cooler, there is no significant heat transter betwem the compressor and surrounding it the inlet air conditions are $100$ K$\backslash$rho $\backslash$alpha $,20$c$.$ determine the power required to drive the compressor. determine the heat rejection in the after cooler