$1)$Two methods can be used in accounting for uncollectible accounts. Identify and contrast the two methods. How do the methods differ regarding the time periods in which Bad Debt Expense is recognized?$$

$2)$Customer purchases using credit cards are a significant source of revenue for many retailers. From the standpoint of a retailer, briefly discuss some advantages and disadvantages of a retail store having its own credit card as opposed to accepting one of the national credit cards $($e$.$g$.,$ Visa, MasterCard$).$

$3)$Your roommate is uncertain about the advantages of a promissory note. Compare the advantages of a note receivable with those of an account receivable.

$4)$Seaver Books, a small book publishing company, wrote off the debt of The Learning Center, and the Academy of Basic Education, both small private schools, after it determined that the schools were facing serious financial difficulty. No notice of the action was sent to the schools; Seaver Books simply stopped sending bills. Nearly a year later, The Learning Center was given a large endowment and a government grant. The resulting publicity brought the school to the attention of Seaver Books, which immediately reinstated the account, and sent a new bill to the school, including interest for the entire time the debt was outstanding. No further action was taken regarding the Academy of Basic Education, which was still operational.$$Did Seaver Books act ethically in reinstating the debt of one client, and not the other?$$ Explain