Q12: Imagine a linked list mylist that contains integers 1,2,3,4,5 following lines of code? ist mylist that contains integers 1,2,3,4,5 in order. What value is printed by Listcint::iterator itr - mylist, begini int x = 1; for (i itr != mylist.end(); itr++) X = X**itr; cout :top() in terms of which vector function? (a) vector::back() vector:: front() vector::end() vector:: begin()