Q2) for LTI discrete time system described by: y(n) = 2 y(n-1) + x(n) y(-1) = 0.1 x(n) = (0.4)" u(n) find 1. The output response y(n) using Z-transform 2. Impulse response h(n) 3. Roc of X(z), H(z) and Y(z)

Which of the following statements about equipment grounding conductors (EGCS) is true? A. The National Electrical Code permits the EGC to also perform as a grounding electrode conductor. B. More than one EGC must be used if multiple circuits are installed in a single raceway, cable, or cable tray. C. No current should be present in the EGC during normal operation. D. EGCs are required to be decreased in size to address voltage drop.

QUESTION 3 We are running 3 wires and a ground in a RMC to a control panel with a 60 amp circuit breaker disconnect in the control panel. The conduit is run along the ceiling where the ambient air temperature is 100 degrees. The control panel feeds our secondary cooling pump. What size are the ungrounded conductors? All conductors have typeTHHN insulation.

Please answer in typing format