C++ Questions.

13. Indicate if each of the following cout statements is valid or invalid. A. cout << "Hello" << endl; B. cout << "Hello" << ; C. cout << "Hello "; D. cout << Hello;

15. Assume that variables x, y, and result are all integers and that x = 4 and y = 7. What value will be stored in result by each of the following statements? A. result = x + y; B. result = y * 2; C. result = y / 2; D. result = y / 2.0;

16. Assume that x and result are both double variables, that y is an int variable, and that x = 2.5 and y = 7. What value will be stored in result by each of the following statements? A. result = x + y; B. result = y * 2; C. result = y / 4; D. result = y / 4.0;