please someone solve this question

2. Estimate (a) the evaporating temperature in each effect, (b) the requirements of steam, and c) the area of the heat transfer surface for a two effect evaporator. Steam is available at 100kPa gauge pressure and the pressure in the second effect is 20kPa absolute. Assume an overall heat transfer coefficient of 600 and 450Jm"?s=lc in the first and second effects respectively. The evaporator is to concentrate 15,000kgh' of raw milk from 9.5 % solids to 35% solids. Assume the sensible heat can be ignored, and there is no boiling-point elevation (a) 1st effect 94C, 2nd effect 60C (b) 5.746kght. 0.53kg steam/kg water (C) 450m)