A mechаnicаlly ventilаted patient is gоing tо be placed оn pressure support ventilation following an acceptable spontaneous weaning trial. The patient is a 5'9" male who weighs 185 lb. During volume-controlled continuous mandatory ventilation (VC-CMV) his average peak inspiratory pressure (PIP) was about 26 cm H2O and the plateau pressure (PPlateau) was 16 cm H2O. What initial pressure support level should be set?