(Simple Encryption) Some information on the Internet may be encrypted with a simple algorithm known as "rot13," which rotates each character by 13 positions in the alphabet. Thus, 'a corresponds to 'n', and 'x' corresponds to k. rot13 is an example of symmetric key encryption. With symmetric key encryption, both the encrypter and decrypter use the same key. a) Write a program that encrypts a message using rot13. corresponds to K b) Write a program that decrypts the scrambled message using 13 as the key