please answer a and b

WITHOUT using excel.

thanks in advance

1. Consider the following table Scenario Severe recession Mild recession Normal growth Boom Probability 0.05 0.25 0.40 0.30 Stock Fund Rate of Return -40% -14% 17% 33% Bond Fund Rate of Return -9% 15% 8% -5% a) Calculate the values of mean return and variance for the stock fund. (Do not round intermediate calculations. Round your answer to 2 decimal places.) b) Calculate the value of the covariance between stock and bond funds. (Do not round intermediate calculations. Round your answer to 2 decimal places.)