Let y[n] = xpn [n] x cos(fon), xpn[n] has a 1s17 format cos(fon) has a 1soo format giving y[n] a 2soo format. For this question pn[n] is the 1s17 format random signal obtained from the Verilog HDL variable rand_4 defined by: always (posedge clk) rand_4 = {1'b0, lfsr_23 [22], lfsr_22 [21], lfsr_21 [20], lfsr_20 [19], 13'b0}; (a) Find y[n]. (b) Find y[n] (c) Find (y[n] -y[n]) 2