Consider the following sample data:

x $1113151719$

y $1917151311$

picture Click here for the Excel Data File

a$.$ Calculate the covariance between the variables. $($Negative value should be indicated by a minus sign. Round your intermediate calculations to at least $4$ decimal places and final answer to $2$ decimal places.$)$

b$.$ Calculate the correlation coefficient. $($Round your intermediate calculations to $4$ decimal places and final answer to $2$ decimal places.$)$