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The radius of the aorta in a test subject determined by MRI is 1

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The radius of the aorta in a test subject determined by MRI is 1.2 cm. At rest, his end diastolic volume is 140 mL and his end systolic volume is 55 mL. His diastolic pressure is 70 mm Hg and his systolic pressure is 115 mm Hg. If we start the cardiac cycle at the opening of the mitral valve, the aortic valve in this person opens at 0.55 seconds and closes at 0.9 seconds. The entire cycle lasts 1.1 seconds in this person. The density of blood is 1.055 g/ml and its viscosity is 3.0 x 10-3 Pa s. A Pascal is a N/m2. Using this information, answer the following questions: A. What is the stroke volume? B. What is the heart rate? C. What is the cardiac output? D. What is the period of ejection? E. What is the average velocity of blood in the aorta?