15. What was the alpha of a fund that earned an average annual return of 5.6% over the last 4 years. The risk-free rate was 0.6% and the average market return was 6.6% during that time. The fund's and the market's returns had a correlation of 0.7. The standard deviation of returns was 53% for the fund and 23% for the market. Answer in percent, rounded to one decimal place.