If The Cystosine Marked With An Above C Is Substituted By Adenine A What Amino A

If the cystosine marked with an * above (C*) is substituted by Adenine(A):

What amino acid was coded by the original codon before the mutation occurs?

what amino acid is coded by the codon after the mutation has occurred?

what type of mutation are we dealing with?

How will the mutation affect the protein’s function?