A chemical process involves five streams that need to be heated or cooled. Consider a

minimum temperature approach of $10F$ and assume that no phase change occurs. All

necessary information is provided in the following table:

$($a$)$ Construct and plot the hot and cold composite curves.

$(4$ points$)$

$($b$)$ What are the required heating and cooling utilities in BTU$/$h$?$

$(6$ points$)$