Answer:
Step-by-step explanation:
Point C is neither zero nor maximum velocity since the potential energy is not at the total energy line nor at the minimum it goes to.
Point D is an imaginary velocity since the potential energy is over the total energy line.
Point G is the maximum velocity since the potential energy is at a minimum.
Point F is zero velocity since the potential energy is equal to the total energy, making it so there is no kinetic energy, which means there is no velocity.