For q.no (iv), find the inverse of the given function

Q(v) f (x) = $\left\{\begin{array}{ccc}\mathrm{x}& \mathrm{x}<& 1\\ {\mathrm{x}}^2& 1\le & \mathrm{x}\le 4\\ 8\sqrt{\mathrm{x}},& \mathrm{x}>& 4\end{array}\right.$