agraph Internal = 55 mm External = 0.1 mm Ese = -84 mv 3a. Describe the chemical and electrical driving forces at a Vm of -84 mv. 3b. Describe the chemical and electrical driving forces at a Vm of -60 mv. 3c. Describe the chemical and electrical driving forces at a Vm of -99 mv. 3d. Describe the chemical and electrical driving forces at a Vm of +8 mv. Example #4: Br (anion) Internal = 16 mm External = 68 mm Egr = -39 mv 4a. Describe the chemical and electrical driving forces at a Vm of -39 mV. 4b. Describe the chemical and electrical driving forces at a Vm of -55 mv. 4c. Describe the chemical and electrical driving forces at a Vm of-21 mv. 4d. Describe the chemical and electrical driving forces at a Vm of +38 mv