R-134a is throttled from 1200kPa and 40oC to 200kPa. It is known that heat of 5kJ/kg is lost from R-134a to the surroundings at 20oC. Determine (a) the specific enthalpy of R-134a at the exit; (b) the temperature at exit; (c) the specific entropy of R-134a at the exit; and (d) the specific entropy generation.