Compound A is a novel poly(ester amide) copolymer that can be used as a bioabsorbable coating for the controlled release of drugs. A is a copolymer of four monomers, two of which are amino acids or amino acid derivatives. The body's enzymes recognize the naturally occurring amino acids in the polymer backbone, allowing for controlled enzymatic breakdown of the polymer and steady release of an encapsulated drug. Draw the four monomers used to synthesize A in the order that they appear (left to right) in the compound; then name the two amino acids. Draw all amino acids in their neutral form and do not add wedges or dashes to your structures.