9. Explain why parity bits were created. Explain the difference between odd and even parity. Given the following bit patterns, show how they would be represented (for the given parity):

a. 100 (odd parity) c. 110101 (odd parity)

b. 100 (even parity) d. 110101 (even parity)

a. 100 (odd parity): 1000

b. 100 (even parity): 1001

c. 110101 (odd parity): 1101011

d. 110101 (even parity) 1101010