Question 2: [3 marks] Implement the following non-member function, which receives a queue containing a mathematical expression and a stack for storing the result of the function. void parse(QueueDLL\& expr, StackDLL\& ops) This function removes from expr all the operators (could be,,+/ or ) and stores them in ops. Example. If expr ={11 ', '+', '2', '-', '3', '*', '4'\}, where '1' is the first element in the queue, the contents expr and ops become as follows when the function returns