Idaho Slopes $($IS$)$ and Dakota Steppes $($DS$)$ are both seasonal businesses. IS is a downhill skiing facility,

while DS is a tour company that specializes in walking tours and camping. The equally likely returns on

each company over the next year is expected to be: $($see picture$)$

Using the data above calculate the following:

$1)$ The means of IS and DS

$2)$ The variances of IS and DS

$3)$ The covariance between the IS and DS returns

$4)$ The correlation between the returns of IS and DS

Then if IS and DS are combined in a portfolio with $50\%$ invested in each, what are the expected return and the risk?

Please show steps for each part, and don't use excel or table format to answer. Thank you!