$(20$ points$)$ Consider the following graphs G$1$ and G$2.$

G$1$

G$2$

$($a$)$ Assess whether $G_1$ and $G_2$ are isomorphic. Explain.

$($b$)$ Represent G$1$ using adjacency matrix.

$($c$)$ Represent G$2$ using an adjacency matrix.

$($d$)$ What is the degree of each vertex on G$1$ and G$2.$