I'm so confused

3. In the following diagrams. the black dots represent points where the illustrated lines are tangent to indifference curves. Y R Y R Y R Y R Y R X X X X X Figure A Figure B Figure C Figure D Figure E . In which figure(s) is X a normal good? . In which figure(s) is X a Giffen good? a b c. In which figure(s) is Y an inferior good? d. In which figure(s) is Y a Giffen good