Masters level finance- need one problem solved- due thursday 11/8

Hello,

I just need one problem answered. It’s just text answer. There isn’t any problem solving involved. The problem I need done is P14-24.

Question:

Some companies’ debt-equity targets are expressed not as a debt ratio, but as a target debt rating on a firm’s outstanding bonds. What are the pros and cons of setting a target rating, rather than a target ratio?