Higher-order system-unit-step response curve

Question

Questions:

Higher-Order System : Unit-step Response Curve

Consider a higher order system defined by (see attached file for equation):

                    C(s)/R(s) = 6.3223s² + 18s + 12.811/s⁴ + 6s³ + 11.3223s² + 18s + 12.811

a) Using MATLAB, plot the unit-step response curve of this system.

b) Obtain the rise time, peak time, maximum overshoot, and settling time of the system.

Please type it in Microsoft Word using Equation Editor. It makes it easier to understand.