Hello I would love some help with these ASAP thank you so much!

Linear combinations:

1. Returns on stocks X and Y are listed below:

Period 1 2 3 4 5 6 7

Stock X 8 % 0% 3% -2% 5% 12% 7%

period 1 2 3 4 5 6 7

Stock Y 5% -2 4% 7% 1% 12% -3%

What is the (population) covariance of returns on the two stocks?

Please round your answer to six decimal places.

Note that the correct answer will be evaluated based

on the full-precision result you would obtain using Excel.

2. Returns on stocks X and Y are listed below:

Period 1 2 3 4 5 6 7

Stock X 7% 1% -2% -3% 5% 11% 5%

Period 1 2 3 4 5 6 7

Stock Y -4% 10% 4% 8% 7% -1% 3%

Consider a portfolio of 10% stock X and 90% stock Y.

What is the mean of portfolio returns?

Please specify your answer in decimal terms and round your answer to the nearest thousandth (e.g., enter 12.3 percent as 0.123).

3. Returns on stocks X and Y are listed below:

Period 1 2 3 4 5 6 7

Stock X 4% 7% -2% 40% 0% 10% -1%

Period 1 2 3 4 5 6 7

Stock Y 2% -5% 7% 4% 6% 11% -4%

Consider a portfolio of 60% stock X and 40% stock Y.

What is the (population) variance of portfolio returns?

Please round your answer to six decimal places.

Note that the correct answer will be evaluated based

on the full-precision result you would obtain using Excel.

4. Summary statistics for returns on two stocks X and Y are listed below.

Stock X Mean Variance

3.16% 0.005000

Stock Y Mean Variance

2.97% 0.004000

The covariance of returns on stocks X and Y is 0.002700. Consider a portfolio of 60% stock X and 40% stock Y.

What is the mean of portfolio returns?

Please specify your answer in decimal terms and round your answer to the nearest thousandth (e.g., enter 12.3 percent as 0.123).

5. Summary statistics for returns on two stocks X and Y are listed below.

Stock X Mean Variance

4.88% 0.005000

Stock Y Mean Variance

3.72% 0.007000

The covariance of returns on stocks X and Y is 0.001500. Consider a portfolio of 80% stock X and 20% stock Y.

What is the standard deviation of portfolio returns?

Please specify your answer in decimal terms and round your answer to the nearest thousandth (e.g., enter 12.3 percent as 0.123).

Note that the correct answer will be evaluated based

on the full-precision result you would obtain using Excel.