I will have a test tomorrow and I've seem something known as the Mason rule for solving block diagrams.. I would like someone to teach me how to use it so I can see whats going on. I posted a picture below. Read it carefully.

so please use step by step instructions and tell me how you got certain values such as why is this negative, etc.

4. Reduce the system shown in Figure P5.4 to a single transfer function, T(s) = C(s)/R(s). [Sec- tion: 5.2) G3650 R(5) Cs) G100 G2(5) G4() HS) FIGURE P5.4