3.2 Divide a N = 4 point DFT into two 2-point DFTS for even and odd temporal values. Show that the mth spectral value X[m], where m 0, 1, 2, 3, is given as follows: X[m] = r[0] 1+ r[2] (-1) + (-j) [r[1] -1+r[3] (-1)"] With the 4-point FFT, give the spectral values of the temporal r [0, 1,0,-1] Display graphically the necessary steps in the caluculations. Denote the intermediate values after each subsequent step. For self-control, check that %3D