THIS IS R PROGRAMMING QUESTION We can use the output of `table()` with `barplot()` to view the frequency of levels in a factor. Can you provide a barplot for the factor below.  > (levels(a)=c("Low","Medium","High")) [1] "Low" "Medium" "High" > (b=factor(a,levels=c("Low","Medium","High"),ordered=TRUE)) [1] Low Low Low Low Medium Medium Medium [8] Medium High High High High Levels: Low < Medium < High > summary(b) Low Medium High 4 4 4