I'm trying to figure out how do this in R language. Thank you in advance!

Data subsetting Call the built-in dataset of mtcars. Generate a new column model that contains the row names of the dataset. Generate a new dataset that only contains the columns of mpg, cyl, model. Sort the new dataset by mpg. Generate a new column cost which is defined as following: High(mpg 25). aggregate mpg by cost. data ("mtcars")