Im in the process right now and am almost finished. I have already filtered it throught the coffee filter, now Im on the next step which is this

STEP 11

Remove the needle tip. Place a filter and needle tip on the filled syringe, and filter the syringe contents into the sterile vial. Continue this step until all the ‘mixed solution’ is into the sterile vial.

Is this where I use the Whatman filter, how do I use it?