4) Consider the two-port network shown below: Portl 15 Ω 36 Ω Port2 ww www 500 Ω 50 fF €200 Q. 645 pH a) Derive [S] of the network at 28.025 GHz. (25 pts) b) Is the network lossless? Please justify. (5 pts) c) Is the network reciprocal? Please justify. (5 pts) d) Calculate the power loss (in both linear and dB scales) from i) port 1 to port 2 and ii) port 2 to port 1. (Assume Zo = 50 £2) (10 pts)