A tomato-juice evaporator takes in juice at the rate of 1200kgh'1. If the concentrated juice contains 35% of solids and the hourly rate of removal of water is 960 kg, calculate: a) The percentage (0%) of water in the original juice and b) The quantity of steam needed per hour for heating if the evaporator works at a pressure of 10kPa and the heat available from the steam is 2,200 kJkg"'. Assume no heat losses.