You make a capacitor by cutting the 12.5-cm-diameter bottoms out of two aluminum pie plates, separating them by 3.50 mm, and connecting them across a 6.00-V battery. What's the capacitance of your capacitor? Express your answer with the appropriate units. If you disconnect the battery and separate the plates to a distance of 3.50 cm without discharging them, what will be the potential difference between them? Express your answer with the appropriate units.