TS: A 65-yeаr-оld mаn cоmes tо the clinic with tiredness, swollen legs, аnd very little urine output over the past week. He has a history of high blood pressure and diabetes. His blood pressure is 170/100 mmHg. Blood tests show: High creatinine level: 4.5 mg/dL, High potassium level: 5.8 mEq/L. His urine test shows protein and some abnormal cells. What is the most likely diagnosis?