The current price of one share of stock is 70.00. The stock pays no dividends. The risk-free rate is 3%. One year call and put options on the stock are available for various strike prices. Mr. Smith observes the following prices of the one year options: Strike Price K Kz Call Option 6.50 2.00 Put Option 1.03463 3.32775 Smith buys a call spread consisting of one long call with a strike price of Ki and one short call with a strike price of K2. (K2> K1). a. What is the maximum possible payoff of Smith's portfolio? b. What is the minimum profit of Smith's portfolio?