Problem: The nurse educator is presenting a lecture on the respiratory and cardiovascular systems. Which response given by the nursing staff would indicate to the educator that they have an understanding of cardiac output? "If the client's stroke volume is 70 mL and heart rate is 70 beats per minute, then the cardiac output is 4.7 L/minute." "If the client's stroke volume is 60 mL and heart rate is 60 beats per minute, then the cardiac output is 3.2 L/minute." "If the client's stroke volume is 50 mL and heart rate is 50 beats per minute, then the cardiac output is 2.5 L/minute." "If the client's stroke volume is 80 mL and heart rate is 80 beats per minute, then the cardiac output is 6.0 L/minute."