Show how the following transformation can be accomplished.
(R)-2-bromopentane → (S)-pentan-2-amine

Reaction scheme showing (R)-2-bromopentane to (S)-pentan-2-amine using KCN, NaBH4, and H2O.

Reaction scheme showing (R)-2-bromopentane to (S)-pentan-2-amine using NaN3, H2, and H2O.

Reaction scheme showing (R)-2-bromopentane to (S)-pentan-2-amine using KCN, LiAlH4, and H2O.

Reaction scheme showing (R)-2-bromopentane to (S)-pentan-2-amine using NaN3, LiAlH4, and H2O.

Show how the following transformation can be accomplished.(R)-2-bromopentane → (S)-pentan-2-amine