A nurse needs to draw a blood sample from a patient’s central line. The line is currently infusing Ringer’s lactate. In which order should the nurse take the following steps to draw the blood sample? Number the steps below.

__ attach the flush syringe and flush catheter with normal saline __ stop the infusion and disconnect Ringer’s lactate __ withdraw a blood sample and discard __ scrub the catheter hub __ withdraw the blood sample for the lab