I need all of thse done please.

19. (8 pts) When the program shown below is executed, what is the output to the screen? This probiem deals with the scope of a variable in a program, and the order of execution of #include cioatream uning nameapace atdi void function Aint&); void functionD(int); int nusber4; - nt main) int number3: Eunction A(number): cout