Which of the following is true of the overshoot in a second order system? : a. Overshoot is defined as the ratio between the first two peaks of your oscillation. b. The overshoot is determined by solely by the damping factor, so that knowing the value of the overshoot allows you to back-calculate the damping factor. c. Overshoot only appears in systems in which the damping factor is less than zero. d. If you know the overshoot and the damping factor, you can calculate the rise time.