i Sketch the double-sided spectra (both amplitude and phase) for |n| ≤ 4. (You may use MATLAB) ii Sketch the single-sided spectra (both amplitude and phase) for n ≤ 4. (You may use MATLAB) (a) Quarter Sinusoidal Wave x(t) 1/4 cycle of sinusoid t -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 (b) Spaced Triangular Wave Xb(t) t -3 -2 -1 0 1 2 3