How many controllers should be plotted for problem 3c?

Q How many controllers should be plotted for problem 3c?

A You want to contrast the effect on the step response from varying $\rho$ for two fixed $q_1$ values, so constrasting requires you pick at least two values of $\rho$ for these plots. In addition, contrast the effect on step response from varying $q_1$ for at least two fixed values of $\rho$.

If you use subplot to display the x and $\theta$ step response in a single figure, you can do the above contrast within four figures.

--John