To get the $4$th element from the last position of a vector named x$,$ which ones can be applied? $($We are trying to get the $4$th entry from the bottom or the end of a vector$)$

Question $18$ options:

x$[4]$

tail$($x$,4)$

tail$($x$,4)[1]$

head$($tail$($x$,4),1)$