Please provide EXCEL formula on how to solve this problem

Suppose the expected returns and standard deviations of Stocks A and B are E(R_A) = .086, E(R_B) = .146, _A = .356, and _B = .616.

a-1.	Calculate the expected return of a portfolio that is composed of 31 percent Stock A and 69 percent Stock B when the correlation between the returns on A and B is .46. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

a-2.	Calculate the standard deviation of a portfolio that is composed of 31 percent Stock A and 69 percent Stock B when the correlation between the returns on A and B is .46. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

b.	Calculate the standard deviation of a portfolio with the same portfolio weights as in part (a) when the correlation coefficient between the returns on Stocks A and B is .46. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

a-1 Expected return ______________%

a-2 Standard Deviation ______________%

b. Standard deviation ________________%