Perform global alignment of the DNA sequences GCAGT and TGTCG$.$ Use a match score of $+1,$ a mismatch score of $-1,$ and a linear gap penalty of $-2.$

$*$ What is the optimal alignment score? Enter your answer as an integer:

$*$ Write down the first line of the alignment $($GCAGT with any necessary gap $-$ characters$).$ Do not use any space characters :

$*$ Write down the second line of the alignment $($TGTCG with any necessary gap $-$ characters$).$ Do not use any space characters :