$)$ Read the following data in R and create a categorical variable called $$hostclass$$ variable using

the following condition:

If you use your desktop version of R:

Airbnb $<-$ read.csv$($https:$//$bigblue$.$depaul.edu$/$jlee$141/$econdata$/$eco$520/$airbnb$2019.$csv$)$

If you use bigblue server, the location of file is:

airbnb $<-$ read.csv$("/$var$/$www$/$html$/$jlee$141/$econdata$/$eco$520/$airbnb$2019.$csv$")$

Use appropriate R code to generate the following hostclass variable:

hostclass is defined as:

$0<$ host$\_$total$\_$listings $<3$ : hostclass $=1$

$3<=$ host$\_$total$\_$listings $<20$ : hostclass $=2$

host$\_$total$\_$listings $>=20$ : hostclass $=3$