This part of the lab lets you practice on (i) generation of another type of signal and (ii) the impact of noise on the new input signal. 1. Replace the x(t) that you constructed in Part 1 with a square wave with the period of 0.5 second, the amplitude range of [-2,1], and the duty cycle of 25% (20 pts) Note: Use the same t from Part 1-(a). Use of linspace() is not allowed. Attach your codes and plots 2. Find the output of the replaced x(t) through the noisy channel y(t), applying noise N (with zero mean and variance of 0.5) that you constructed in Part 1. (10 pts)