Your task is to design automated solvers for the shift and Vigenere ciphers. You must use C as the under- lying programming language, in order to get prepared for the following labs. Each solver should be completely automated, i.e., upon reading a text ,l.e. containing the target ciphertext (given as command-line argument), it should print the encryption key and the decrypted plaintext without any user interaction. Test your code on the following ciphertexts, and answer these questions:

1. What is the key of the cipher?

2. What is the decrypted plaintext? Shift Cipher - Decrypt the following ciphertext: ODKBFAXASKBDQEQZFEMPURRUOGXFKZAFRAGZPUZZADYMXMOMPQYUOPUEOUBXUZQEFTQZQQPRADFTQBDABQDUZFQDMOFUAZARODKBFASDMBTKMZPODKBFMZMXKEUEFTUEMDUEQEAGFARFTQRMOFFTMFUZFTQMNEQZOQARDQMXOAYYGZUOMFUAZEDQCGUDQYQZFEUFUEQMEKFABDABAEQMEKEFQYFTMFMBBQMDEGZNDQMWMNXQYMZKMOMPQYUOPQEUSZEMDQEAOAYBXQJFTMFFTQIAGXPNQODKBFMZMXKEFPAQEZAFWZAIITQDQFAEFMDFQJBAEUZSRXMIEUZFTQEQPQEUSZEUERMDTMDPQDFTMZPQEUSZUZSFTQYUZFTQRUDEFBXMOQFTQDQEGXFUEFTMFFTQOAYBQFUFUHQBDAOQEEITUOTUEAZQEFDAZSYAFUHMFUAZUZMOMPQYUODQEQMDOTOMZZAFFMWQTAXP

Vigenere Cipher - Decrypt the following ciphertext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