Write MATLAB code to plot the following waveforms. Submit your code and plots in a single PDF file. 1. (8 pts) Rectangular pulses: a. rect() b. rect(t-T) C. rect(t/t) For T and T, choose any values that make sense. 2. (12 pts) Triangular pulses: a. At b. At-T) C. At/T) For T and T, choose any values that make sense. 3. (8 pts) Impulse approximation: a. 8() b. 8(t-T) For T, choose any value that makes sense. 4. (12 pts) Unit steps: a. u(t) b. ut-T) C. A.ut-T) For T and A, choose any values that make sense. 5. (12 pts) Signums: a. sgn(t) b. sgnt -T) C. A.sgn(t-T) For T and A, choose any values that make sense. 6. (8 pts) Causal exponential: a. e-fu(t) b. A.e-aut-T). For T, a, and A, choose any values that make sense