Binomial Interest Tree - I can't calculate the answer

Hello there,

I am looking at practice question #15 of the CFA Book’s reading 37. You have the following rates:

Node 0

3%

Node 1

U = 4.5027%

D = 3.5419%

Node 2

UU = 6.3679%

UD/DU = 5.0092%

DD = 3.9404%

You are asked to calculate the value of a bond with one-year Libor annually, set in arrears, floored at 3.50%. For the life of me, not only do I not recall doing a practice question similar to this in Schweser, but I cannot reproduce the answers.

Can anyone help me understand why the value is 100.485 (I get like 100.225?) and what does the ‘one-year libor annualy set in arrears’ mean?

Thanks so much in advance!