Choose the alkyl halide(s) from the following list of C₆H₁₃Br isomers that meet each criterion below.

(1) 1-bromohexane

(2) 3-bromo-3-methylpentane

(3) 1-bromo-2,2-dimethylbutane

(4) 3-bromo-2-methylpentane

(5) 2-bromo-3-methylpentane

(a) The compound(s) that can exist as enantiomers

(b) The compound(s) that can exist as diastereomers

(c) The compound that gives the fastest S_N2 reaction with sodium methoxide

(d) The compound that is least reactive to sodium methoxide in methanol

(e) The compound(s) that give only one alkene in the E2 reaction with K^{+ –}OtBu

(f) The compound(s) that give an E2 but no S_N2 reaction with sodium methoxide in methanol

(g) The compound(s) that undergo an S_N1 reaction to give rearranged products

(h) The compound that gives the fastest S_N1 reaction