Price (of x) Quantity (of x) TUx MUx 5 1 20 4 2 15 3 3 45 2 4 6 1 5 55 0 6 58 15. The MU of the first unit of x is ______. 16. The MU of the sixth unit of x is ______. 17. The TU of the second unit of x is ______. 18. Which of the following statements is correct? a. Demand is price elastic in the $2 to $0 price range. b. Demand is price inelastic in the $5 to $3 price range. c. Demand is price elastic in the $3 to $0 price range. d. Demand is price inelastic in the $2 to $0 price range