Consider the following program written in C pseudocode: int a = 1; /* global */ void foo(int x){ a++; x = x + 2; } void main(){ foo(a); } For each of the following parameter-passing methods, what will...

Consider the following program written in C pseudocode:

int a = 1;    /* global */

void foo(int x){    a++;
x = x + 2; } void main(){    foo(a); }

For each of the following parameter-passing methods, what will be the values ofa andb after running the program?

1)   Passed by value

2)   Passed by reference

3)   Passed by value-result