1. The price of an item you want to buy is given in dollars and cents. You pay for it in cash by giving the clerk d dollars and cents. Write specifications for a function that computes the change, if any, that you should receive. Include a statement of purpose, the preconditions and postconditions, and a description of the arguments.

5. Suppose that a bag contains strings that represent various grocery items. Write a C++ function that removes and counts all occurrences of a given string from such a bag. Your function should return this number. Use comments in javadoc style to fully specify your function. Accommodate the possibility that the given bag is either empty or does not contain any occurrences of the given string.