The current price of a non-dividend-paying stock is $50 per share. The prices of European call and put options written on the stock with strike price $50 and expiring in 6 months are $10 and $6, respectively. The risk-free rate is currently 8% per year with continuous compounding. Please explain briefly if there is an arbitrage opportunity, and if so, how would take advantage of it. Be precise as to what instruments you would buy and sell, and in which quantities.