cryptograpy please solve part 8

this is part 4

8. Cryptosystem Security Definition: For each of the ciphers from question (4) indicate how many bits of security it has against an adversary capable of only brute-force attacks. (In part 4 e assume that the key length, 4 , is known). 4. Classical Ciphers: Consider the message "I FOUND THE SECRET". Encrypt the message using the following ciphers. Assume plaintext, ciphertext, and keys are all capital English letters: A=0,B=1,,Z=25. Keep spaces as is.: (a) A Shift (Caesar) cipher with key H. (b) An Affine cipher with key (C,Y). (c) A Vegenre cipher with key MILK (d) A Vernam cipher with key CDKGJV NREFJFEDN IFOUNDTHESECRET