Exercise 5. Consider a generator polynomial g(D), which contains the factor D + 1. A) Show that when using g(D) to compute the CRC bits, any odd number of errors in the received string is detected [pt. 10]. [Hint: Recall that a non-zero error polynomial e(D) is detected unless e(D) = g(D)z(D) for some polynomial z(D). Look at what happens if 1 is substituted for D in this equation.]