$(20\%)$ Consider $F_2|$ Block $|C_{\text{m}\text{a}\text{x}}$ with zero buffer:

$($a$)$ Draw a TSP graph with arc costs and find the optimal sequence and its $C_{\text{m}\text{a}\text{x}}$ by

using enumeration.

$($b$)$ Find the optimal sequence and its $C_{\text{m}\text{a}\text{x}}$ by assuming that the buffer size is four

$($no blocking$).$