Price discrimination is often defended on the basis of equity. What is meant by this statement? Comment on its validity.

Please help me so I can complete the following:

Please write your response in an essay format. The two essays must be well structured and with a quality that is commensurate with graduate level writing standards.

1. Price discrimination is often defended on the basis of equity. What is meant by this statement? Comment on its validity.

2. Because credit card companies and banks must charge the same interest rate on credit cards to all borrowers, there is an adverse selection problem with credits card. How does a credit card company or firm know whether a person will be a high-quality borrower (i.e., one who pays the debts) or a low-quality borrower (i.e. one who does not pay debts)? Describe
a. how the restriction of a single rate leads to an adverse selection problem, and
b. at least two potential means that credit card companies can use to try to lessen this problem.