$($b$)(8$ points$)$ Given the substitution matrix $S$

fill in the below dynamic programming matrix $D$ for locally aligning the strings CCGT and CTCG

with a gap score of $-2.$ Please fill in both numerical values and trace$-$back arrows.

$($c$)(8$ points$)$ Write all backtrack arrows neatly on matrix D$.$

$($d$)(8$ points$)$ Write lines showing what the alignments are on top of matrix $D.$

$($e$)(8$ points$)$ Below, write what the possible alignments are: