2 Alison wants to use an affine cipher to encrypt messages

Last updated: 9/13/2023

2 Alison wants to use an affine cipher to encrypt messages containing capital let ters lower case letters and five symbols for punctuation period comma colon question mark and space a Verify that e x 28r 35 is a valid affine cipher for this extended alphabet b Calculate the decryption function for Alison s cipher c How many such ciphers are possible