Which type of node comprises incoming as well as outgoing branches? Select one: a. Source node b. Sink node c. Chain node (mixed) d. Main node The output signal is fed back at the input side from the¸ Select one: a. Take-off b. Summing c. All of the choices d. Differential point For the transfer function given below, where does the zero of the system lie? G(s) = 5s -1/s² + 5s +4 a. b. C. d. Select one: a. s=-4&s=-1 b. s=-1/5 c. s = 1/5 • d. s=-1&s=-1/4