Use the table below to answer questions

The following table shows the closing prices of two stocks over the past seven business days.

Use Excel to calculate the covariance between stock X and Y closing prices.?

Use Excel to calculate the z-score of stock X observation $27?

Use Excel to calculate the coefficient of variation of stock X. ?

Use Excel to calculate the correlation between stock X and Y closing prices?

Stock X $15 $27 $10 $13 $25 $9 $18 Stock Y $48 $55 $40 $88 $53 $47 $40