1. The following is a sentence encrypted with a monoalphabetic substitution cipher. Your task is to decrypt it. Take some time to examine the cipher text. Make notes of your findings. If, after trying to crack the encryption code, you need a hint, go on to Step 2. 54:68:69:73:20:69:73:20:6e:6f:74:20:61:20:73:65:63:75:72:65:20:6d:65:73:73: 61:67:65:20:62:65:63:61:75:73:65:20:62:6f:74:68:20:68:65:78:61:64:65:63:69: 6d:61:6c:20:61:6e:64:20:41:53:43:49:49:20:61:72:65:20:77:65:6c:6c:20:6b:6e:6f: 77:6e:20:63:68:61:72:61:63:74:65:72:20:73:65:74:73:20:61:6e:64:20:74:68:65:72: 65:20:61:72:65:20:61:75:74:6f:6d:61:74:69:63:20:63:6f:6e:76:65:72:74:65:72:73: 20:6f:6e:6c:69:6e:65:2e