In a CRC error-detection scheme, choose p(x) = x4 + x2 + x1+ 1

Using binary division

a. Encode the bits 10010011011 b. Introduce an error pattern 100010000000000 (i.e invert the digit in the code word where 1 appears in the error pattern sequence.) and see if the error can be detected c. Introduce an error pattern 101110000000000 and see if the error can be detected.