$(6\mathrm{.}5$ points$)$ What is the value of a $3-$year step$-$up callable note that pays $5\%$ for two years and then

$8\%$ for two more years using the interest rate tree below. Assume that this note is callable in one year

at par $($$$100).($i$.$e$.$ The bond is callable starting from year $1).($all calculation pls$)$