16. (Optio) Recall the product DFA P that counts an even number of zeros and an odd number of ones: Use the state elimination method to convert P to a regular expression. (To control the complexity, you may wish to define names for intermediate regexes.) 16. (Optio) Recall the product DFA P that counts an even number of zeros and an odd number of ones: Use the state elimination method to convert P to a regular expression. (To control the complexity, you may wish to define names for intermediate regexes.)