2 men are carrying a 200 kg box; one at each end. They are on stairs which are at a 45 degree angle with the ground. The box they are carrying is also at a 45 degree angle, so the stairs and ground are parallel. The lengths of the box are 1.23 m and .5 m, and both men exert a vertical force on the box. They aren't moving/there's no velocity or acceleration involved. How do you calculate the force each man applies to the box?