A 1-year European call option on a dividend-paying stock is currently selling for $4. The stock price is $32, the strike price is $30. One dividend payment, with the amount of $0.60, is expected in three months. The risk-free interest rate is 6% per annum for all maturities (continuously compounded). If there exists an arbitrage opportunity, please state clearly the arbitrage strategy. If not, please explain why.