Suppose you want to send three signals (Cos or Sin wave) through a transmission medium. Each signal is 60 degrees shifted from one another. Amplitude of the signals are 91, 36, and 69, respectively. Frequency of the signals are 369, 919, and 183, respectively.

In MATLAB, plot the composite signal in both time and frequency domain in a figure titled “Input signal”. In the figure use subplot to show all signals in time domain, composite signal in time and frequency domain. Use valid label in x-axis & y-axis.