2. The following ciphertext has been encrypted with a Caesar cipher (with an unknown- to-you shift). Decrypt the message. mzmdy mzpmx qs For the next two problems, use the following symmetric cipher table: PLAINTEXT ABCDEFGHIJKLMNOPQRSTUVWXYZ CIPHERTEXT YNVTRQGPFO JXB KE SAL HDZCMIUW PLAINTEXT QMVTOI GSXKNRWB JHFEPDYC Z LAU CIPHERTEXT ABCDEFGHIJKLMNOPQRSTUVWXYZ