Consider two PN sequences of period N = 63. One sequence has the feedback taps [6, 1] and the other sequence has the feedback taps [6, 5, 2, 1], which are picked in accordance with Table 7.1.

(a) Compute the autocorrelation function of these two sequences, and their cross- correlation function.

(b) Compare the cross-correlation function computed in part (a) with the cross- correlation function between the sequence [6, 5, 2, 1] and its mirror image [6, 5, 4, 1]. Comment on your results.