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.

Step 1: stop the infusion and disconnect Ringer’s lactate Step 2: scrub the catheter hub Step 3: attach the flush syringe and flush catheter with normal saline Step 4: withdraw a blood sample and discard Step 5: withdraw the blood sample for the lab