PLEASE HELP IM GIVING A LOT OF POINTS! I'm losing a rank because of this!

1.Beatrice is pushing a heavy box. She pushes with a force of 40 N. How can you determine if Beatrice is doing work?
2. Beatrice pushes the box 2 meters to the right. What formula should you use to calculate the amount of work done on the box?
3. How much work does Beatrice do pushing the box?

THANK YOU FOR YOUR TIME!