1. The curves below are from two voltage clamp experiments with a squid axon with a resting potential of -75 mV. In the upper trace the clamp voltage was stepped from resting potential to +65mV at time 0. In the lower trace the clamp voltage was stepped from the resting potential to -20 mV at time 0. According to previous tests, we know that in this experiment the ENa+= +55 mV, EK+ = -90mV, and the action potential threshold = -55mV. Only considering potassium and sodium, themajorcurrents at X, Y, and Z are, respectively: (Hint: The current you see on the figure is the current that is injected to counteract the natural flow of ions in the cell at a particular, constant voltage.)