Problem 1. For each of the following systems: \text { a. } h[n]=\frac{1}{n+1}(u[n]-u[n-4]) \text { b. } h[n]=2\left(\frac{1}{2}\right)^{n} u[n] complete the steps below: 1. Compute H(e^jw) by applying the definition

of the DTFT. \text { 2. Plot }\left|H\left(e^{j \omega}\right)\right| \text { and } \angle H\left(e^{j \omega}\right) \text { from }[-\pi, \pi] \text { in MATLAB. }