Please answer the following questions using the given information.

an amino acid sequence of a heptapeptide gave the following information: Asp, Ala, Lys$,$ Met, Phe, and Tyr$.$

$1.$Trypsin had no effect

$2.$PITC analysis gave the phenyl alanine derivative

$3.$Chymotrypsin $($which cleaves after aromatic amino acids$)$ gave a dipeptide and tetrapeptide, which contained Leu, Lys and Met.

$4.$ Cyanogen bromide, which cleaves after methionine residues, gave a dipeptide, tetrapeptide, and free lys$.$

Question $1.$Trypsin had no effect on the polypeptide what does this tell you about the sequence N and C terminus?

Question $2.$ PITC analysis gave the phenyl alanine derivative what does this tell you about the N and C terminus?

Question $3.$ please show the correct cleavages of each step

Question $4.$ Using the information above what is the new final sequence?