$2.$ Data Inspection

$($a$)$ Show the brief description and summary statistics for the imported data using str$()$

and summary$().$

$($b$)$ Show the number of rows and columns using nrow$()$ and ncol$().$

$($c$)$ print the names of columns using name$().$

$($d$)$ Inspect whether there exist missing values. If yes, print the total number of missing values

and remove the row$($s$)$ with missing values using and na$.$omit$().$ Name the new data set D$1.$

$($e$)$ Print first three rows $($exactly three rows$)$ using head$().$

$($f$)$ Repeat part $($a$)$ for D$1$ and compare the results with $($a