Hello, I would like to solve these questions (5,6,7) today, please

1. Find the parity bits for the following bit pattern, using two- dimensional parity. Assume even parity.

1010101 1110101 0110101 1010100

2. A receiver receives the bit pattern 01001001 if the system is using even parity, is the pattern in error?

3. Assume that the following frame (1 1 0 0 1 1 0 1 0 1 1 0) is received across a data link using CRC for error detection. And the divisor is represented by the equation of x4 + x + 1. Check whether the received frame is correct or incorrect. If the frame is correct, then deduce the original message.

4. Assume that the received Hamming codeword is:

11 10 9 8 7 6 5 4 3 2 1

1

0

1

0

0

1

1

0

0

1

0

Deduce the original data word from the above codeword after correction if any error.

5. Suppose our data is (1, 5, 7, 9, 11) that we want to send to a destination, and the block size is 4 bit.
   1. Find the checksum at the sender site.
   2. Find the checksum at the receiver site if there is no error.

6. Draw the sender and receiver flow diagram for a system using Stop- and-Wait ARQ. Given the following actions:
   1. Frame 0 is sent; frame 0 is acknowledged.
   2. Frames 1 is lost.
   3. Frame 1 is acknowledged.
   4. Frames 0 is sent; frame 0 is acknowledged but the acknowledgment is lost.
   5. Frame 0 is acknowledged.

7. A computer is using 4 bits to represent the sequence numbers. Draw the sender and receiver windows for a system using Selective Repeat ARQ.

Given the following actions:

1. Frame 0 is sent; frame 0 is acknowledged.
2. Frames 1 and 2 are sent; frames 1 and 2 are acknowledged.
3. Frames 3 is sent and lost.
4. Frames 4 and 5 are sent.
5. Frames 3 through 5 are acknowledged.