Based on the code below, answer the question below. #include #include using namespace std; int main() { queue q; q.push(1); q.push(2); q.push(3); q.push(4); cout < < "There are " < < q.size(); cout Produce additional statements to the above code to calculate the difference between the first and the last element. Contoh/Example: Input: 2, 3, 4, 5 Output: 3. (5 markah/marks)