1- Compute the time domain signals corresponding to the following Discrete Time Fourier Transforms. 3п a) X(ei) = {1,≤ w≤37 0, otherwise b) X(ej)=1+2e-jw + 3ejzw c) X(ejw) = cos² (w) 2- Consider a discrete-time LTI system with impulse response h[n] = "u[n] Use Fourier Transforms to determine the response to the following input signal: 3 x[n] = "u[n "u[n]