For this question I had been using Spirit AIrlines 2015 10k report on module 1. However, I'm a bit lost as to how to read it in terms of bonds. Can

For this question I had been using Spirit AIrlines 2015 10k report on module 1. However, I'm a bit lost as to how to read it in terms of bonds. Can someone explain this to me? 

http://ir.spirit.com/financials.cfm 

Using the 10K report you downloaded in Module 1, determine if your firm has either invested in or issued bonds. For either the bond issuance or investment, describe the nature of the bonds including maturity and interest rate. If the bonds are an investment, include the name of the company. If the bonds are an issuance by the company, describe the use of the proceeds from the bond issuance. (Note: if your firm does not have bond investments or has not issued bonds, then please research an example of an aviation firm that has issued bonds within the last 5 years.)

A bond is a security that bears an interest and obligates the issuer to pay the bondholder aspecified amount of money, usually at specific intervals, and to repay the principal amount of theloan...