i got this question wrong. can you help me solve it. i am lost on how to solve it but going link up with a friend to see if we can solve it lol

e consider a Cipher-Block Chaining Mode (CBC mode) for a block cipher which implements the encryption as G E(M G K) for i? 4- W GE(M G1 ; K) for i> 0 where MaM2Ms message blocks and Co is a randomly chosen initial vector. Explain how decryption is done and write down the decryption equation. Draw a block both encryption and decryption operations for M,M2Ms and the a. corresponding b. How does a bit error in the ciphertext influence decryption? (Assume that C is obtained corrupted because of a bit error. How does it affect the next decryption steps?)