Can someone please answer both questions? They are fairly similar questions, and I was hoping that it would make it easier to solve them both together. Thanks for your help, and please, please answer them both. Again, thanks for your help, and I hope you have a wonderful rest of your day.
BC:9.2 Find the discrete-time Fourier transform (DTFT) for the following sampled time signals. (Hint: use the tables of DTFT pairs and DTFT properties)
a.) xa[n] = (0.25e^(j0.5n)) - 4u[n+1]
b.) xb[n] = rect(8)
c.) xc[n] = rect(6[n-2])
d.) xe[n] = -0.25cos(0.45n)u[n]
BC:9.3 Find the sampled time signal that corresponds to each of the following normalized spectra. (Hint: use the tables of DTFT pairs and DTFT properties)
a.) Xej = 6
b.) Xe = W-2Tk / 0.2T
c.) xe = 1 - 2k / 0.75
d.) Xae = e^(-j20-2k) / 0.5
e.) ei = cos(6+1)