Show that the discrete fourier transform of (0,1,-1,0) is (x, x, x2,x)-10, ( , (1+i) 24) find the dft of the time sequence (2,-2), compare it's amplitude spectrum with that of (2.-2,0,0) and comment on the effect on the amplitude spectrum of adding zeros to a time sequence 25) verify parseval's theorem for the series (2,-2,0,0) and the shifted series (0,2.-2,0) and comment on amplitude of a shifted time series.