Align the following two DNA sequences using the global sequence alignment dynamic programming method, with a match score $=1$; mismatch score $=-1$; gap $=-2$ penalty. Calculate the scores for the matrix $($see attached file$).$

S$1$: GATGA S$2$: TGAGA

Answer the following three questions in the space below. Label each answer with the appropriate question letter $($a$-$c$)$

$($a$)$ What is the score in the cell in the top right corner of the matrix? Write this score below.

$($b$)$ What is the best global alignment? Write the best global alignment write in the space below.

$($c$)$ What is the score of the best global alignment? Write the score in the space below.