1. What is the purpose of static_cast? 2. How is the IPO used in the main program? 3. What is the purpose of the manipulator, endi? 4. In the output comments in the code, what 3 words does each output comment end with 5. What do the letters IPO represent? 6. What is one of the two preprocessor directives that must be included in this program? 7. In the CPP file, where are the constants included relative to the main function