The code shown in the video accompanying this assignment demonstrates that you can use the function or command sd$()$ to find the standard deviation of a variable. For example if you have a data set named mydata and a variable named myvariable then sd$($mydata$myvariable$)$ will return the standard deviation of myvariable. Use the code below to create a new data set of only diamonds with color $"$E$."$

color.E $<-$ diamonds$[$which$($diamonds$color $=="$E$"),]$

What is the standard deviation of the price of E color diamonds?