Problem 1 Find the closed-loop transfer function of the following system usign SFGs R(S) G₁(s) H₁(s) G4(s) G₂(s) Y(s) • First set N = 0, find the transfer function of R(s) G3(s) H₂(s) + + + N(s) Y(s) Secondly set R = 0 and find the transfer function of Y(s) N (s) ● Express Y(s) in terms of R(s) and N(s) when both inputs are applied simultaneously • Find the desired relation among the transfer functions G₁ (s), G₂ (s), G3(s), G4(s), H₁(s), and H₂(s) so that the output Y(s) is not affected by the disturbance signal N(s) at all