Imagine that you have been given a sample of racemic 2-phenylbutanoic acid. Outline steps that would allow you to obtain pure samples of each of the following compounds from this starting material and any other reagents.

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(a) (b) (c) (d) (e) Et T (R)-Ph-CH-NH-C-OMe Et O T (S)-Ph-CH-C-OEI || Et T (R,R)-Ph-CH-NH-C-NH-CH-Ph Et T Et T Et T (R)-Ph—CH–NH- Et I meso-Ph—CH–NHC-NH–CH–Ph -CO,H