4. a) Draw the predicted whole-cell current-voltage (IV) relationship based on the single-channel (1') current-voltage relationship and the open probability (Po) curves. (4 marks) b) You measure the current from this new channel as a result of the changes in voltage shown above the current trace. Draw underneath the current diagram the gating scheme for this new ion channel using the following nomenclature: C closed; 0 open; I inactivate. (6 marks)