For the following program: 1. Sketch the corresponding process tree -- being sure to indicate outputs and circle synchronization points, if they exist. 2. List all distinct outputs that could be produced when it is executed. main() { int x = ; printf("1"); if (fork() == 0) { printf("2"); X += 1; } else if (fork() == 0) { printf("3"); X += 1; } if (x 0); printf("4"); } else { printf("5"); 3 }