Abox is being pulled right with a force of 40 n left 40 n, up 10 n and down 10 n

The question doesn't ask about anything in particular. I'll compute the net force as a guide, so you can solve your own problem.

The net force is zero

Explanation:

Net Force

If we want to compute the net force exerted on a body, we must add them as vectors, i.e. the horizontal and vertical components independently.

The box has 4 forces, as follow

40 N right

40 N left

10 N up

10 N down

The vertical forces are equal and opposite, i.e. their sum is zero. The same situation happens in the horizontal direction, both forces are of equal magnitude and opposite, their sum is zero. The net force is then, zero in both axes

b.

explanation:

10.0

f=ma newton's second law 7x8=56n