14. Sketch the root locus and find the range of K for stability for the unity feedback system shown in Figure P8.3 for the following conditions: [Section: 8.5] 2 K(s²+1) (s-1)(s+2)(s+3) K(s² - 2s+2) a. G(s) = b. G(s) = s(s+1)(s+2)