From the accepted overshoot we find that the damping factor has to be

bigger than 0.59, from the peak time we conclude that natural frequency has to bigger

than 1.95 but from the settling time we conclude that it only needs to be bigger

than 0.5

From the accepted overshoot we find that the damping factor has to be bigger than 0.59, from the settling time the natural frequency bigger than 0.5 but from the peak time we conclude that it really has to bigger than 1.95

From the accepted overshoot we find that the damping factor has to be

bigger than 0.59, from the settling time the natural frequency bigger

than 0.5

Matlab gives the values with the damp command