a) Given the DNA sequences S1, S2 and S3 and their alignments as below: $1 = TGCG S2 = AGCTG S3 = AGCG m m m T G C A G C A G MA m5 ms G G G and given the following scoring scheme s(x,y)=1 when x = y s(x,y) = -1 when x != y s(-,-) = 0: when gap vs gap Based on the scoring scheme, calculate the SP score for each of the alignments shown above, and determine which alignment is better. [3 marks] - m m m3 m4 ms T G G A G A G EUUU T EIHI s(x,-) = -2 when x vs gap s(-,y)=-2 when gap vs y T G G -