Consider stock XYZ with a current price of $30, and its put option with an exercise price of $50 and expiry in one year. The stock price follows a binomial process with d=0.90 and u=1.1 per six months (d and u are constant over the year). The continuously compounded risk free rate is 4.8% per annum.

A) Use the Binomial option-pricing model to calculate the put option values at all nodes on the Binomial tree, i.e., now, 6 months from now and at maturity. In your answer you must draw the binomial trees for the value of the underlying stock and for the value of the put option.

PLEASE EXPLAIN WHERE YOU ARE GETTING THE VALUES FROM FOR THE BINOMIAL TREES