You bought a stock nine months ago at $23 a share. Today, you sold that stock for $28.50 a share.
The stock paid no dividends. What was your annualized rate of return?

Over the past six years, a stock produced returns of 5.2, 18.1, 6.4, 111.2, L2, and 1.9 percent,
respectively. For these same six years, the risk-free rate has been 2.4, 3.2, 1.8, 2.2, 4.8, and 1.8 percent,
respectively. What's the arithmetic average risk premium on the stock for this time period?