Please calculate the value of the option of a 2 years 5% putable bond knowing that:

a. The option can be exercised only after one year

b. The interest rate tree is given by: one year rate = 4%; one year out rates rL = 4.5%, rH = 5.5%

c. The bond can be put at par

Edit: This is the entire question...This is all I was given...