use R as coding language and ans fast pls

Consider the. following commands and output: X a bc def ghij 7 10 2 2 11, 12 3 3 6 9 13, 14,. .15 > str (x) data . frame ' : 3 obs. of 4 variables: $ a : int 1 2 3 $ bc : int 4 5 6. $ def : int 7 89 $ ghij : List of 3 . . $ k: int 10 . . $ 1: int 11 12 . .5 m: int 13 14 15 Extract the vector c (13, 14, 15) from the data frame x by using all of the following four ways: 1. Only the $ operator 2. Only square brackets (non-recursive indexing) 3. Only recursive indexing 4. Only the with () function Put each command on a separate line. Do not add unnecessary numbering; each line should be valid R code. View Insert