Cooling water leaves the condenser of a power plant and enters a wet cooling tower at 35oC

Question:

Cooling water leaves the condenser of a power plant and enters a wet cooling tower at 35oC at a rate of 100 kg/s. The water is cooled to 22oC in the cooling tower by air which enters the tower at 100 kPa, 20oC, 60% R.H. and leaves saturated at 30oC. Neglecting the power input to the fan, determine
(a) The volume flow rate of air into the cooling tower and
(b) The mass flow rate of the required makeup water.