To determine the performance of a portfolio of Mexican equities, you need to calculate its Sharpe ratio. The portfolio has the following characteristics: an expected return of 8.7%, volatility (standard deviation) of 12.0%, and a beta of 1.4 relative to the IPC Index. The IPC Index itself has an expected return of 4.0% and a volatility of 8.7%. Given that the risk-free rate is 2.0%, what is the Sharpe ratio for this portfolio?