solve the circuit Study the following circuit then answer the questions: $1.$ Assume that one$-$way flow control valve is partially closed, which speed, extension or retraction, is limited$?$ Why? $2.$Explain how you can extend cylinder A in steps using the switches S$1$ and S$2.3.$ Assuming S$1$ is closed, S$2$ is open, and A is extended, what would happen if S$1$ is open? $4.$Assuming S$1$ is closed, S$2$ is kept closed and A is extended, what would happen if S$2$ is opened?