Based on the following assigned table answer the questions 1 and 2: 02 3 4 5 67 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1. Using shift cipher algorithm described in the class, answer the following: a. Encrypt text "We are Trojans". The key (k) is 5. Show the steps b. Decrypt ciphertext "frpsxwhu". The key (k) is 3. Show the steps 2. Using Vigenere algorithm described in the class, answer the following: a. Encrypt text We are Trojans". The key is "GO". Show the steps b. Decrypt ciphertext "VBQSJSFX". The key is "ONE" Show the steps J cone 3. Explain briefly the differences between Message Authentication Code (MAC) and hash function