Data and Computer Security test

Realize something. I won't be a successful cryptanalysis or cracker. Always mess up with the shifting characters when try to decrypt cipher. Nearly left blank for the three decryption questions.

Caesar cipher. I go analyze the frequency and arrangement of the characters. Then try to shift accordingly. Did not come to my mind that decryption require me to shift backwards. And I can get the answer by treat it like a Caesar cipher. Doink.

The ASCII encryption with the keys. I do the calculation with 127 instead of 128. Don't know why I like the number so much..