You’re designing an external defibrillator that discharges a capacitor through the patient’s body, providing a pulse that stops ventricular fibrillation. Specifications call for a capacitor storing 250 J of energy; when discharged through a body with 40Ω transthoracic resistance, the capacitor voltage is to drop to half its initial value in 10 ms. Determine the capacitance (to the nearest 10 μF) and initial capacitor voltage (to the nearest 100 V) that meet these specs.