please do it in 25 minutes please urgently.. I'll give you up thumb definitely

6. For stock ZZZ, the average excess return is 0.0988 (or 9.88%), and the variance of excess returns is 0.0117072. If the average risk-free rate is 0.0213 (or 2.13%) over the time period, calculate the Sharpe ratio for the stock. a. 0.4461 b. 0.5028 c. 0.6885 d. 0.9131 e. None of the above