Outline an efficient synthesis of each of the following compounds from the indicated start...

Outline an efficient synthesis of each of the following compounds from the indicated starting material and any necessary organic or inorganic reagents:

(a) Cyclopentyl cyanide from cyclopentane

(b) Cyclopentyl cyanide from cyclopentene

(c) Cyclopentyl cyanide from cyclopentanol

(d) NCCH2CH2CN from ethyl alcohol

(e) Isobutyl iodide from isobutyl chloride

(f) Isobutyl iodide from tert-butyl chloride

(g) Isopropyl azide from isopropyl alcohol

(h) Isopropyl azide from l-propanol

(i) (S)-sec-Butyl azide from (R)-sec-butyl alcohol

(j) 

from (R)-sec-butyl alcohol SH