a. In a CRC error-detecting scheme, choose P1X2 = X4 + X + 1. Encode the bits 10010011011.

b. Suppose the channel introduces an error pattern 100010000000000 (i.e., a flip from 1 to 0 or from 0 to 1 in position 1 and 5). What is received? Can the error be detected?

c. Repeat part

(b) with error pattern 100110000000000.