Show how each transformation may be accomplished by using a nitrile as an intermediate. You may use any necessary reagents.
(a) hexan-1-ol $\rightarrow$ heptan- 1 -amine
(b) cyclohexanecarboxamide $\rightarrow$ cyclohexyl ethyl ketone
(c) octan-1-ol $\rightarrow \operatorname{decan}-2$ -one