An evaporator is fed with 15,000 kg/h of a solution containing 10% NaCl, 15% NaOH and the rest water by weight. In the operation, water is evaporated and NaCl is precipitated as crystals. The thick liquor leaving the evaporator contains 45% NaOH, 2% NaCl and the rest water. Determine the following: a) Amount of water evaporated b) Amount of salt precipitated and c) Amount of thick liquor obtained.