There’s no cashiers, meaning if you need help you got to figure it out alone.
It would be the last one, because she isn't recording any type of data over what she is doing and she isn't observing it at all. She simply trimmed the stems of a bouquet of flowers. However, the other options insist that they are recording data and observing, like you would do when performing an experiment. I hope this helps! :)
To create a directory, you can use the command mkdir. Below is an example:
mkdir /var/oracle/database/9i
