Question 1 Simplify the block diagram shown in the following figure. Obtain the transfer function relating C(s) and R(s). Rx) G₁₂ G₂ Question 2 Simplify the block diagram shown in the following figure. H₁ G H C Question 3 Simplify the block diagram shown in the following figure. Then obtain the closed-loop transfer function C(s)/R(s). M G N. G N