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This problem-based learning (PBL) question involves encoding/decoding using a Bifid cipher. Consider the following secret message: "BBHYY ACWWL NTAZA PLLBS CHQOT PIA" It has been encoded using a Bifid cipher with key 'Polytechnic' and period or block size 5. Search the Internet for information about Bifid Cipher, to help you understand the method. a) Show 55 Polybius square with horizontal key. b) Decode the message. c) Show your work