please need explanation.

8. For the diagram to the right, calculate the absolute Price : value of price elasticity of demand over the price range from $40 to $30. 40 A) 0.19048 B) 0.42857 C) 11.66667 . . .. D) 0.08571 E) 5.25 F) 2.33333 G) 0.28571 H) 3.5 . . . . I) none of the above . . !"' : 20 . . .. . . .. : Demand 10.. . . . ..4 : 0 2 4 6 8 10 quantity 9. Suppose the absolute value of price elasticity of demand for Good X is 1/4. This means a 2 percent increase in the price of X will cause a : A) 8 percent decrease in the quantity demanded for Good X. B) 8 percent increase in the quantity demanded for Good X. C) 1/2 percent decrease in the quantity demanded for Good X. D) 1/2 percent increase in the quantity demanded for Good X. E) 4 percent decrease in the quantity demanded for Good X. 10. If at the current price, demand is inelastic, then increasing the price will A) Decrease total revenue B) Increase total revenue C) Have no effect on total revenue. D) The effect on total revenue cannot be determined Price 11. For the diagram to the right, calculate the value of price 60 . . . . . . 535 50514:.. :--Supply elasticity of supply over the price range from $20 to $40. A) 1.5 B) 0.6667 C) 0.1333 D) 7.5 40 E) 3 F) 0.3333 G) 1.3333 H) 0.75 I) none of the above 20 - . . . 4 6 8 quantity 12. If income elasticity is '% then the good is A) an inferior good and a 1 percent increase in income decreases quantity demanded by 2 percent. B) an inferior good and a 1 percent increase in income decreases quantity demanded by 1/2 a percent. C) a normal good and a 1 percent increase in income increases quantity demanded by 2 percent. D) a normal good and a 1 percent increase in income increases quantity demanded by 1/2 a percent. E) none of the above