what is the output of this program?

please provide explanation:

What is the output of the following program? Explain your answers clearly.(Providing just output values without explanation will not receive credit) #include #include #include #include #include int main () { int n, status; pid t child; n = 0; if (! (child = fork () ) ) { n = 1; fprintf (stderr, "n = $d\ ", n) ; n = 2; } else { n = 3; fprintf (stderr, "n = $d\ ", n) ; n = 4; exit (0) ; fprintf (stderr, "n = $d\ ", n) ; w waitpid (child, &status, 0) ; n = 5; fprintf (stderr, "n = $d\ ", n) ; return 0