I need help with questions 7 9 and 10 specifically

2. Stacy has a Macy's credit card. On Monday she charged a $39.85 sweater and then lost the card. Madison found it Monday and charged a $100 scarf and $400 purse. Stacy missed her card at 8 a.m. Tuesday and called the store. Madison then charged a coat for $4,000. Stacy's bill was $4,539.85. Stacy owes:

a. $39.85.

b. $4,539.85.

c. $539.85.

d. $89.85.

I picked D because FCCPA protects the credit card holder from loss by limiting to $50 dollars unless ALL of the transactions occured before the card was reported stolen. Since 2 transactions happened after the card was reported i added the 50$ on to 39.85$ BUT im not sure if I am understanding that correctly so I dont know if it is actually right.

7. Buy Best, an electronics and appliances retailer sells a refrigerator for $400 to Rhonda, a consumer, and does not provide her with a written warranty for the refrigerator. Which of the following is true under the Magnuson-Moss Act?

a. Buy Best may not disclaim or modify any implied warranty.

b. Buy Best must designate the warranty as full or limited.

c. Buy Best may disclaim any and all implied warranties.

d. None of these answers are correct.

Not sure what the answer for 7 would be.

9. If a consumer complains about a company's defective goods under state law, which agency will most likely investigate and prosecute the violations?

a. The state attorney general.

b. The Federal Trade Commission.

c. The Securities and Exchange Commission.

d. The U.S. Department of Justice.

Do not know the answer

10. If the Consumer Financial Protection Bureau finds that Wall Street Marketing and Financial Services Inc. violated a provision of providing a consumer financial service, which of the following penalties is the CFPB authorized to assess?

a. $5,000 fine per day for any violation.

b. $25,000 per day for reckless violations.

c. $1 million per day for knowing violations.

d. All of these answers are correct.