Write a program to simulate the calculation of CRC.

The implementation has two parts:

a. Calculating the CRC at the sender

b. Verifying the codeword with CRC at the receiver

Calculating CRC at the sender

Inputs:

1. D ata word in binary with a length of N bits

2. D ivisor in binary with a length of D bits

3. N umber of redundant bit s to be added to the dataword , R bits

Output:

Codeword of length of N+R bits ( codeword with CRC)

Verifying the codeword with CRC at the receiver

Inputs:

1. Codeword in binary with a length of N+R bits

2. Divisor in binary with length of D bits

Output:

Message indicating whether codeword is valid or corrupted