Calculate by Using MATLAB the following transfer functions: 20(s + 2(s + 3(s + 6(s + 8 a.G1s ss + 7s + 9s + 10s + 15 represented as a numerator polynomial divided by a denominator polynomial
s^4 + 17s^3 + 99s^2 + 223s + 140
expressed as factors in the numerator divided by factors in the denominator, similar to the form of Gi(s) in Prelab 3a.
c.G3s = G1s + Gs; G4s = Gs - Gs; G5s = G1sGs
expressed as factors divided by factors and expressed as polynomials divided by polynomials.