DSB-SC signal for given rectangular message signal given in figure 1 and carrier signal c(t) = cos(2π1000t). a. Find DSB

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You do not have to do any of the matlab coding. I just need helpwith all of the hand calculations. thank you!
DSB-SC signal for given rectangular message signal given in figure 1 and carrier signal c(t) = cos(2π1000t). a. Find DSB-SC signal S DSB-SC b. Find spectrum of SDSB-SC(t) signal and plot it with MATLAB c. Find the bandwidth B, of DSB-SC signal T d. Find the power of DSB-SC signal e. Find demodulation signal and plot it for 0 ≤ t ≤ 0.04s with MATLAB 1.5 1 0.5 들이 -0.5 -1.5 0.005 0.01 (t)and plot it for 0 ≤ t ≤ 0.04s with MATLAB 0.015 0.02 0.025 0.03 0.035 0.04 t Figure 1. Rectangular Signal close all; clear all; clc fs=25000; %sampling frequency t=0:1/fs:0.04; V=1; fm-100; m-V*square (2*pi*fm*t, 50); stairs (t, x) grid on axis ([0 4e-2 -1.5 1.5]) xlabel ('t') ylabel ('m(t)')