Complete the following Mendius and Stephen's reductions:

Explanation

During the Mendius reduction of `(R-C-=N)` to `(R-underset(H_(a))underset(|)overset(H_(a))overset(|)(C)-underset(H_(b))underset(|)(N)-H_(b)) (1^(@) amine)` by `LAH`, two `H_(a)` atoms are supplied by the reagent and two `H_(b)` atoms are supplied by the solvent `H_(2)O`.
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iii.
During the Mendius reduction of `(R-C-=N)` to `(R-underset(H_(a))underset(|)overset(H_(a))overset(|)(C)-underset(H_(b))underset(|)(N)-H_(b)) (1^(@) amine)` by `(Sn+HCl rarr SnCl_(2)+2[H])`, all the hydrogens `(H_(a) or H_(b))` are supplied by the acid. Similarly, during the reduction by `(N_(a)+ROH rarr RONa+[H])`, all hydrogens are supplied by the solvent `(ROH)`.
iv. `Me-underset((A))(C)-=N underset(+4[D])overset(Sn+DCl)(rarr) Me-underset((E))(CD_(2))-ND_(2)`
v. `Me-underset((A))(C)-=N underset(+4[D])overset(Na+ROD)(rarr) Me-underset((F))(CD_(2))-ND_(2)`