questions required plot graph. please do them electronically!

18. Plot the value of f c n as a function of the separation distance for a system at f c = 6GHz with a xed transmitted and a receiver separated by more than d = {5, 20, 100, 200, 500, 1000}m. What do you observe?

19. Assume a Rayleigh fading channel plot: i) the power outage probability of this channel with average signal power 2 2 = 50 dBm for threshold values P th = {25, 40, 60, 80}dBm; ii) The average signal power required for a power outage probability of 10 4 at the same threshold values. What do you observe?

20. For a Rayleigh fading channel with f D = 20Hz and average power, P r = {10, 30, 50}dBm, plot the average fade duration for target fade values: P 0 = {5, 10, 15, 20, 25, 30, 35, 40, 45, 50}dBm. Then, do the same for the same values but assuming them in dB instead of dBm. What do you observe all together?