5.Compute explicitly the N = 4 = 2² Frank code. What is the sequence of phases in the code (expressed as an angle in radians, e.g. 0, pi/3, etc.)? Compute the autocorrelation function of the detected code sequence explicitly by hand. Sketch the magnitude of the autocorrelation function. What is the peak sidelobe level, relative to the peak of the autocorrelation function, in dB? Repeat problem #5 for a P4 code with length N = 4. (Be sure to use the complex autocorrelation function.)