Show how you would accomplish the following synthetic transformations. You may use any necessary reagents. (a) N-ethylbenzamide

Question:

Show how you would accomplish the following synthetic transformations. You may use any necessary reagents.
(a) N-ethylbenzamide → benzylethylamine
(b) Ethyl benzoate → N-ethylbenzamide
(c) Pyrrolidine → N-acetylpyrrolidine
(d) γ-aminobutyric acid → pyrrolidine