d) Please draw a plot of fractional saturation versus the partial pressure of oxygen, O to 100 torr, for i) adult hemoglobin in red blood cells at pH 7.4 and with no CO2. Label this curve "2,3-BPG". On the same plot draw the binding curve for ii) pure hemoglobin in solution at pH 7.4 with no CO2 and in the absence of 2,3-BPG and label it "no 2,3- BPG". Again on the same plot draw the binding curve for iii) adult hemoglobin in red blood cells at pH 7.2 and with no CO2.. Label this curve "adult