A data frame has been uploaded and saved in $R$ with the name Datal. Which command below would find the entry in the $10$th row and $9$th column in the data frame, and store that value as a variable called entry?

entry Datal $10,9$

entry $==$Datal$[10,9]$

entrydatal $9,10$

entrydatal $c(10,9)$

entry $=$Datal$[9,10]$