Chapter 27.2, Problem 6P

The enolate derived from diethyl acetamidomalonate is treated with each of the following alkyl halides. After hydrolysis and decarboxylation, what amino acid is formed: (a) ${\text{CH}}_{\text{3}}\text{I}$; (b) ${\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}{\text{CHCH}}_{\text{2}}\text{Cl}$; (c) ${\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}\text{CH}\left({\text{CH}}_{\text{3}}\right)\text{Br}$?