(iii)

\[\begin{array}{*{35}{l}}

~x~\in ~N  \\

~2\text{ }<\text{ }5/2\text{ }<\text{ }3  \\

\end{array}\]

So when, when x is a natural number, the maximum possible value of x is 2. We know that the natural numbers start from 1, the solution of the given inequation is {1, 2}.