Find the time domain specifications (delay time, rise time, peak time, peak percentage overshoot, and settling time ) of a control system having the closed loop transfer function 8/2?^2+4?+8 when the...

Find the time domain specifications (delay time, rise time, peak time, peak percentage
overshoot, and settling time ) of a control system having the closed loop transfer

function
8/2?^2+4?+8
when the unit step signal is applied as an input to this control system.