The following data were obtained from a man weighing 70 kgAoa oxygen (O2) content = 20.0 vol%Femoral vein O2 content = 16 vol%Coronary sinus O2 content = 10 vol%Pulmonary aery O2 content = 15 vol%Total body O2 consumption = 400 ml/minWhat is the cardiac output of this man?