MATLAB Exercises:
1. Generate a sinusoidal sequence of length 50, frequency 0.08, amplitude 2.5, and phase shift 90 degrees and display it using the stem command; and (b) the plot command.
2. Generate and display a Gaussian random signal of length 75 whose elements are normally distributed with zero mean and a variance of 3. (Use the commands randn and stem.)
3. Generate and display a random signal of length 100 whose elements are uniformly distributed on [-2,2]. (Use the commands rand and stem.)