Problem: A 58-year-old woman with diabetes and a history of myocardial infarct presents with a complaint of shortness of breath and edema. She denies chest pain. Physical exam reveals inspiratory crackles in both lungs and an S3. BP is 100/60, HR 106, RR 24. Chest x-ray shows cardiomegaly and ECG shows old MI and sinus rhythm. Echocardiogram shows a hypodymanic left ventricle with an ejection graction og 35%. Which of the following diagnosis is most likely? a. heart failure with reduced ejection fraction (HFrEF) b. heart failure with preserved ejection fraction (HFpEF) c. both B and C d. neither B or C