The city government is considering two tax proposals: . A lump-sum tax of $300 on each producer of hamburgers. . A tax of $1 per burger, paid by producers of hamburgers. Which of the following statements is true as a result of the lump-sum tax? Check all that apply. O Marginal cost will remain unchanged. Average total cost will increase. Average fixed cost will decrease. O Average variable cost will increase. Which of the following statements is true as a result of the per-burger tax? Check all that apply. O Marginal cost will remain unchanged. Average variable cost will increase. Average total cost will increase. O Average fixed cost will increase