(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}.