where as a =50 and b=0

Consider the following open loop transfer functions s+a + 2b = (s)I70) (s + a)(s + b) 1 GOL2 (s) = (s +a + 5)(s + b + 3) GoL3 (s) = (s +a+j+1)(s + a - j+1) a) For each of the above transfer functions, 1. Determine the number of asymptotes and the corresponding angles of the asymptotes 2. Determine the centroid point 3. Determine the regions on real axis where the root locus exists