# CG Q$5$b # Use the mean$()$ function to calculate the average price for the Napa Sonoma sub$-$regionusing a single line of code. Using R # CG Q$5$a # Use the mean$()$ function to calculate the average points for the Napa Sonoma sub$-$region.

####### Your code should be a single line and will use the square brackets for subsetting.. using R