GATE Electronics and Communications (EC) 2018 Solved Paper

For a unity feedback control system with the forward path transfer function
$\mathit{G}\left(\mathit{s}\right)=\frac{\mathit{K}}{\mathit{s}\left(\mathit{s}+2\right)}$
The peak resonant magnitude Mr of the closed-loop frequency response is 2. The corresponding value of the gain K (correct to two decimal places) is _______.