Q4. A second-order system is underdamped with a damping ratio of 0.4 and a natural frequency of 10 Hz. Find a) the transfer function b) the time response when it is subjected to a unit-step input and the rise time. Hint: use the command stepinfo.
Q5. Given the transfer function: G(s) = (s + 15) / (s + 100), find the peak time (Tp), percent overshoot (POT), and rise time (Tr).
Q6. For the sinusoidal input u(t) = sin(10t) applied to the system: G(s) = (s + 2), determine the steady-state output of the system.