Superheated steam at 100 kPa and 110°C enters a condenser at 80 kg/s. The steam leaves the condenser as a saturated liquid at 100 kPa. Liquid water is used to cool the steam. The water enters the condenser heat exchanger at 20°C with a flow rate of 4 m3 /s (it does not mix with the steam). Determine the exit temperature of the cooling water.