Question 516] Let A, C, G, T). You may think of these as DNA tags(but it is irrelevant to the solution). Design a DFA that accepts exactly the strings that start with either A or T, and end witha character different from the one they started from. For instance, your DFA should accept the strings "ACCGGTAC" and "TCGCCAATA" but not the strings "CGAAGTCA" or "AGGCCAAACGCA". 29