A solution of organic colloids is brought from $5$ to $50\%$ by weight; it is desired to remove a total of $4536$ kg$/$h of water from the original solution in order to concentrate it$.$ The solution has a negligible boiling point rise. The heat capacity of the feed is $4\mathrm{.}1$kJ$/$kg$.$K and enters at $15\mathrm{.}8\backslash$deg C$.$ Saturated steam at $101\mathrm{.}32$ kPa is used as the heating medium. The operating pressure in the evaporator is $15\mathrm{.}3$ kPa. The overall heat transfer coefficient is $2$ kW$/$m$2.$K$.$ What surface area $($m$2)$ and what steam consumption is required $(1\mathrm{.}5$ pts$)$