The following table lists the current stock price $(S_0),$ annualized return volatility $(),$ time period for each step$(t),$ and risk$-$free rate $(r).$ Use the information above to build a $2-$step binomial tree so as to value a two$-$month Europen call option with a strike price $(K)$ of $85.$ You need to provide your work to receive partial credit.

$S_0=79\mathrm{.}60$

$=0\mathrm{.}187$

$t=1$ month

$r=0\mathrm{.}0135$