Which health care provider is practicing medical asepsis

Which health care provider is practicing medical asepsis? geoquad Resident scrubbing their hands before assisting on an appendectomy geoquad Surgical tech applying sterle bandages over an incision site at the end of an operation geoquad Nurse setting up a sterile field and using sterile supplies for insertion of a urinary catheter geoquad Physician assistant disinfecting a stethoscope after listening to the chest of a patient with bronchitis