kindly explain it line by line

b) Using C++ functions, what will be displayed on the output window after executing C++ fragments (i) int funExam (int \&x, int \&y, int \&z); int main ()\{ int a=2,b=3,c=2,d=1; c=a++b%6+++d;c=22%,6+2=6 d= funExam (a,b,c), cout