Question about Floater Calculation

I was doing the questions on Study Session 14 Valuation and Analysis : Bonds with Enbedded Options

The question 18 is about floater calculation, however, I did not see this context convered in the notes. But in the exam focus Page 185 "Finally, be able to value capped or floored floaters and understand the terminology and risk/return characteristics of convertibles. "

Can anyone tell me what happened here…?