The approriate reagents for the following transformation?

Question

 

$\begin{array}{1 1}(a)\;(1) HO-HO,H_3O^+,(2) NaBH_4,(3)H_3O^+\\(b)\;(1) HO-HO,H_3O^+,(2) KMnO_4,(3)H_3O^+\\(c)\;(1)RMgX,(2) H_2O,(3)KMnO_4\\(d)\;(1) LiAlH_4,(2) H_2O,(3)KMnO_4\end{array}$