levi and clara are trying to move a very heavy box. levi is pushing the box with a force of 30 n, and clara is pulling the box with a force of 50 n. the box exerts a frictional force of 65 n.

which best explains the forces?

there is a net force of 15 n in the direction of levi.
there is a net force of 15 n in the direction of clara.
there is no net force, so the forces are balanced.
there is no net force, so the forces are unbalanced.