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14. Assume itr is an iterator for a list container. Which of the following is true: a) *itr advances the iterator to the next location. b) * itr returns a reference to the object stored at iterator itr's location. c) *itr reurns a reference to the object stored at the beginning of the list. 15. When the upper and lower bounds on the execution time for an algorithm are the same, we use: a) big-Omega notation. b) asymptotic analysis. c) big-Oh notation. d) Average case analysis. e) Theta notation. f) Worst case analysis. 16. The method iterator end () returns an iterator representing the position: a) of the last element in the container. b) of the element before the last element in the container. c) after the last element in the container. 17. Which of the following is false if T(N)=N3. a) T(N)=O(N3) b) T(N)=O(N5) c) T(N)=O(N3logN) d) T(N)=O(N2) e) T(N)=O(N4) 18. Asymptotic analysis refers to: a) The execution time of an algorithm in its best, worst, or average case. b) The growth in the execution time of an algorithm as the input size grows towards infinity. c) The size of a data structure. d) The execution time of an algorithm for small input sizes