Considering the pseudo code listed below 1. read x; 2. i = 0; 3. while (i < x){ 4. if ((i mod 7) = = 5){ 5. i = i + 2; 6. x = x +1; 7. print x; } 8. else i = i + 1; 9. if ((i mod 7) = = 6) 10. x = x +1; } 11. print x; Answer the following three questions: (1) Draw the control flow graph of this program (10 points) (2) For each node, check if there are Definition, C-use or P-use for any variable. List Definition, C-use or/and P-use for all variables (15 points) (3) List all def-c-use pairs with respect to the variable x. Use the format (var x, def_line_number, use_line_number) (10 points