please help, i don't understand this, please explain

Question 7 (1 point) What would happen if one monopoly had perfect price discrimination? (as in: being able to charge a different price to every consumer) O The equilibrium would be the same as in perfect competition but all the surplus would go to the monopoly O The quantity produced would be even less than without the price discrimination O The MR curve would be horizontal O The equilibrium would be the same as in perfect competition, including the CS and PS Question 8 (1 point) A firm currently produces 100 units of some good. The average cost per unit is $20. If the firm decides to produce one more unit, this average cost will increase. What can you say about the marginal cost of the 101th unit? 0 The MC must be more than $20 0 The MC must be less than $20 since there is a negative relationship between the ATC and MC. O The MC must be $20 or less 0 The MC must be greater than the AFC