The correct answers are circled, just explain and show me how to get to them

9-12. The diagram below shows Frank's demand curve for a particular product. Look at the diagram and then answer the questions below (questions 9 through 12). Price 1000 Demand 225 250 Quantity 9. The equation of this demand curve is: A) Q = 400 - 0.25P B) P = 400 -0.25Q C) P = 1000 -0.25Q D) Q = 1000 - 0.25P E) Q = 1000 + 4P F)P = 1000-4Q G) P = 4000 -0.25Q H) P =250 -4Q I) Q=250 -4P J) none of the above 10. If the price is $100, then Frank's total utility from consuming this product will be: A) $100 B) $225 C) $250 D) $1,000 E) $22,500 F) $25,000 G) $101,250 H) $125,000 1) $202,500 none of the above 11. If the price is $100, then the marginal utility of the last unit consumed will be: $100 B) $225 C) $250 D) $1,000 E) $22,500 F) $25,000 G) $101,250 H) $125,000 I) $202,500 J) none of the above 12. If the price is $100, then Frank's consumer surplus will be: A) $100 B) $225 C) $250 D) $1,000 E) $22,500 F) $25,000 $101,250 H) $125,000 I) $202,500 J) none of the above