Refrigerant 134a is the working fluid in a vapor compression heat pump that provides 30 kw to heat a dwelling on a day when the outside temperature is below freezing. saturated vapor enters the compressor at 1.8 bar, and saturated liquid exits the condenser, which operates at 9 bar. the compressor efficiency is 78%. determine for isentropic compression a) sketch the t-s diagram of the cycle b) the refrigerant mass flow rate, in kg/s. c) the compressor power, in kw. d) the coefficient of performance.