Computer has a single FIFO queue of ?xed precision unsigned integers with the length of the queue unbounded. You can use access methods similar to those in the third model. In this model you will have something like front() that will return the value in the front of the queue (the eldest item) rather than top().
(a) Sketch an algorithm to recognize the copy language: the set of strings of form wcw where w is any string of ‘a's and ‘b's.
(b) What is your intuition about the possibility of recognizing the palindrome language of Question 4a (of the form wcwr)?