14. Write C++ instructions to swap the contents of two memory cells n and m. 15. Write C++ statements to compute the expression x2 - 3x for x = 5 and to store the answer in a memory cell. 16. Write...

Extracted text: 14. Write C++ instructions to swap the contents of two memory cells n and m. 15. Write C++ statements to compute the expression x2 - 3x for x = 5 and to store the answer in a memory cell. 16. Write C++ instructions to compute the expression 5x2 + 23x +31 for x = 3.6 and to store the answer in a memory cell.