Can someone explain how to get this output by hand?

Consider the code shown at left below. What is the output of the following C++ program segment, called with confuseDriver()? Write down your answer in the rectangle at right below. Print legibly. Write answer in this box: int s-1, y-3; void confusel (int y, int s) s++i void confuse2 (int b, int &s) s=b+2; void confuse3 (int &a, int &s) s++i void confuseDriver () int y-1; confusel( s, y) confuse2 s, y); confuse3 s, y); cout