The diagram shows the universal set U = {parallelograms}. Set A represents parallelograms with four congruent sides, while B rep
resents parallelograms with four congruent angles. Circles A and B overlap. Circle A contains 12, Circle B contains 6, and the overlap contains 8. Number 3 is outside of the circles. How many of the parallelograms fall into the category A U B? 6 8 18 26