The following are the main steps in the generation of the action potential.1. sodium channels are inactivated2. voltage gated potassium channels open and potassium moves out of the cell, initiating repolarization.3. sodium channels regain their normal properties.4. a grated depolarization brings an area of excitable membrane to threshold.5. a temporary hyperpolarization occurs.6. sodium channel activation occurs.7. sodium ions enter the sell and depolarization occurs. what is the proper sequence of these events? a) 6,7,4,1,2,3,5b) 4,2,5,6,7,3,1c) 4,6,7,3,2,5,1d) 2,4,6,7,1,3,5e) 4,6,7,1,2,3,5