Asolution containing 10% (weight %) solids is to be concentrated to a level of 50% solids. steam is available at a pressure of 0.2 mpa with a saturation temperature of 393k. feed rate to the evaporator is 30,000 kg/h. the evaporator is working at reduced pressure such that boiling point is 323k. the overall heat transfer coefficient is 2.9 kw/(m²k). the feed is introduced at 293k. data: specific heat of feed = 3.98 kj/(kg. k) latent heat of condensation of steam at 0.2 mpa = 2202 kj/kg. latent heat of vaporisation of water at 323k at a pressure in the vapour space = 2383 kj/kg. determine the following: (i) amount of concentrated solution produced; (3 marks) (ii) amount of water vapour produced; (3 marks) (iii) amount of steam consumed; (5 marks) (iv) steam economy of the evaporator; (2 marks) (v) heat transfer rate and (5 marks) (vi) area of heat transfer to be provided