3: Try to reduce the settling time by adjusting gains P, I, and D. Use a methodical approach and describe your strategy in your report. Comment on the effectiveness of a suspension with variable stiffness for this driving scenario. Step 8: Edit the generateA. A. m S-Function and repeat the controller-tuning exercise for the c, parameter. You may either add a second PID controller or simply set k, to a constant value. Question 4: Try to reduce the settling time by adjusting gains P, I, and D. Use a methodical approach and describe your strategy in your report. Comment on the effectiveness of a suspension with variable damping for this driving scenario. Step 9: Modify the model or controller in some way. Describe your objective or the problem you are trying to solve, explain the strategy you used to solve it, and include plots of your results before and after the modification. You may be as creative as you wish. Here are a few ideas: Change the ground-height input to a sinusoidal signal and re-tune you