As before, the first step is to name the note in question using Every Good Boy Does Fine.
In this case, the note is D.
We know the note is D, but there are many notes on the piano named D.
How do we know which one to choose?
An octave is the distance from one note to the next note of the same name.
For example, the distance from Middle C to the next C above it is an octave.
It is on the 3rd space of the staff.
In other words, it will be in the octave just to the right of middle C.
In other words, it will be in the second octave above middle C.