Discuss the following sections about Bondholder Concerns for "apple" in details.

a. Debt type: If your firm borrows money, examine whether it borrows from banks or by issuing bonds. With either one, follow through and find more details on the borrowing.

b. Debt covenants: Check to see if there are covenants or restrictions imposed by the lenders. You may be able to find this information in the annual report or filings with the regulatory agencies.

c. Default risk measures: If your company has been rated by a ratings agency (S&P, Moodys, Fitch), find out the bond rating and the ratings agencys views of the company