$11\mathrm{.}2($a$)$ For $T_{\text{m}\text{i}\text{n}}=10C,$ find the minimum utility requirements for a network of heat exchangers involving the following streams:

$\backslash$table$[[$Stream$,T^x(C),T^t(C),C(\frac{kW}{}C)$

B$.$ For $($a$)$ & $($b$),$ design HENs that require the minimum utilities