(10 points) Suppose that the price of a stock today is at $30. For a strike price of $28 a 3 -month European call option on that stock is quoted with a price of $5, and a 3 -month European put option on the same stock (with same strike price) is quoted at $2. Assume that the risk-free rate is 10% per annum. (a) Does the put-call parity hold? (b) Is their an arbitrage opportunity? If yes, explain in detail how the arbitrage strategy is implemented and compute the exact arbitrage profit which can be realized in 3 months