a client with alzheimer disease is found slumped over the lunch tray on the bedside table, coughing violently with emesis visible in the back of the throat. the client has a pulse of 135/min, respirations 32/min, and oxygen saturation 84%. the client also has circumoral cyanosis and decreased level of consciousness. place the nurse's actions while awaiting the arrival of the rapid response team in priority order. all options must be used.