Assume that a red blood cell is spherical with a radius of 4.3 x 106 In and with wall thickness of 8.5 X 108 m. The dielectric constant of the membrane is about 5.0. The potential difference across the membrane is 0.080 V. Assuming the cell is a parallel plate capacitor, estimate the capacitance of the cell. Express your answer with the appropriate units. Determine the positive charge on the outside and the equal-magnitude negative charge inside. Express your answer with the appropriate units. Fl_equest