6.5-5. For the system of Fig. 6-13, G,(s) = 20(s +5)/(s(s + 4)(s + 6)), with T = 0.05 and D(2) implementing the following difference equation m(k) (a) Find the system type. (b) Plot the unit-step response. 10e(k) 16e(k-1)-6.3e(k-2)+m(k-1) - (c) Find the rise time, overshoot, and settling time. R(s) FIGURE 6-13 System for Example 6.8. C(3) D(2) G(s)