A European call option and put option on a stock both have a strike price of $20 and an expiration date in three months. Both sell for $3. The risk-free interest rate is 10% per annum, the current stock price is $19, and a $1 dividend is expected in one month. Is there an arbitrage opportunity? If there is an arbitrage opportunity, clearly state what condition must be satisfied to eliminate the arbitrage opportunity. What is the strategy followed to make a profit from the arbitrage opportunity? What is the profit expressed as a present value?