A patient is being weaned from continuous mechanical ventilation and the following data is recorded during the weaning period:

A patient is being weaned from continuous mechanical ventilation and the following data is recorded during the weaning period: 8 a.m. 9 a.m. 10 a.m. 12 p.m. 4 p.m. Vt 650 ml 650 ml 650 ml 650 ml 650 ml Mode A/C A/C SIMV SIMV SIMV Rate 12 12 8 6 4 FiO2 0.60 0.50 0.50 0.50 0.40 PEEP 15 15 10 5 5 Spont. Rate 15 15 17 15 15 PaCO2 37 36 44 45 42 PaO2 167 158 150 124 110 Which of the following should the therapist recommend? Group of answer choices Change the FiO2 to 0.30 Change the PEEP to 0 Extubate the patient Change the SIMV rate to 2