Solve these four questions in MATLAB 1. Calculating Series by Cycle 63 S=1+2+2+2*+-+26=2" n=0 t 2. Draw function y = e 3 sin 3t e- 3. The sum of the complex numbers Z1 = 4 + 3i and Z2 = 1+2i 4. The Fourier transform of gate signal is calculated by MATLAB numerical method, and its spectrum chart is drawn. (1, \t 1/2' T=1