Two teachers $(A,B)$ will grade two questions in an exam. Tacher A will grade question $1$ which is $60$

points. Teacher B will grade question $2$ which is $40$ points. Teachers can give the points as below:

Teacher $A0,20,40,60$

Teacher B $0,20,30,40$

If a student takes $60$ or more, he$/$she will be successfull. Design the circuit by using ROM. $(20$p$)$