Can someone please help me with this affine cipher as soon as possible

2.2 e using a res communications. You map the letters to the numbers as in the table: So 0 4 You use an affine cipher with key (3,4) and hence the encryption formula y 3x +4 mod 7 to encrypt the letters. (In the formula x is the plaintext letter and y is the corresponding ciphertext let a. Encrypt the plaintext "bag" using this cipher. Show your work. AFG t b. What is the size of the keyspace for the cipher? Explain. hat is the decryption function? Show your work. a (x-b)mod at is the plaintext message if the corresponding ciphertext is "fgh" aqe