2- Saturated liquid Refrigerant 134a enters the valve at a pressure of 9 bar and is throttled to a pressure of 2 bar. The refrigerant then enters the heat exchanger, exiting at a temperature of 10 C with no significant decrease in pressure. In a separate stream, liquid water at 1 bar enters the heat exchanger at a temperature of 25 C with a mass flow rate of \( 2 \mathrm{~kg} / \mathrm{s} \) and exits at 1 bar as liquid at a temperature of 15 C . Heat exchanger can be assumed as adiabatic and kinetic and potential energy effects can be ignored. Determine (a) the temperature, \( T_{1} \) and \( T_{2} \) in \( C \), of the refrigerant. (b) the mass flow rate of the refrigerant, in kg/s (35p)