please quickly solve this qusetion in simple way (c++)

A: Simplify the following expression step by step (show the intermediate results). (5 Marks)

int x = 3, y = 9;

cout << (5 + 7 == x + y) && ((++x != 4) || true);

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B- Trace the execution of the following program step by step, write the output of the program. (5 Marks)

#include

using namespace std;

void ff (int x, int y);

int a = 1, b = 2;

int main() {

cout << a << '\t' << b << endl;

ff (b, a);

return 0;

}

void ff (int m, int n){

cout << m << '\t' << n << endl;

{ int m = 1; int n = 2;

cout << m << '\t' << n << endl; }

cout << m << '\t' << n << endl;

}