You are called to a nursing home for an​ 85-year-old patient complaining of abdominal pain. the patient has a history of dementia and cannot describe the pain to you. the nurse states the patient has been vomiting dark coffee ground emesis for about an hour. his blood pressure is​ 90/40, pulse​ 100, and respiratory rate of 24. auscultating this​ patient's bowel​ sounds: