Problem 19.7 Given the following: S = $72. r = 8%, 3%, 23%, 1, K-74. Use two-period binomial pricing to find the current price of an American put Problem 19.8 t You are given the following information about American options The current price for a non-dividend paying stock is 7:2 . The strike price is 80 The continuously-compounded risk-free rate is 5% Time to expiration is one year Every six months, the stock price either increases by 25% or decreases by 15% Using a two-period binomial tree, calculate the price of an American put option