What volatilities were used to construct each tree? (You computed zero-coupon bond prices in the previous problem; now you have to compute the year-1 yield volatility for 1-, 2-, 3-, and 4-year bonds.) Can you unambiguously say that rates in one tree are more volatile than the other?
For the next four problems, here are two BDT interest rate trees with effective annual interest rates at each node.

Tree #1 0.08000 0.07676 0.08170 0.07943 0.07552 0.10362 0.10635 0.09953 0.09084 0.13843 0.12473 0.10927 0.15630 0.13143 0.15809 Tree #2 0.08000 0.08112 0.08749 0.0826 0.07284 0.09908 0.10689 0.10096 0.08907 0.13060 0.12338 0.10891 0.15078 0.13317 0.16283