Which of the following taxes is most likely to be regressive?

If you have flipped a fair coin and tails has come up 49 times in a row, what are the odds that the next flip will be a tail?

A) 0 B) 1/50 C) 1/25 D) 1/2

Which of the following is inconsistent with a monopoly?

a. a single seller b. a downward-sloping demand curve c. marginal revenue exceeds price d. a U-shaped average total cost curve