A 91.5 kg man pushes a crate 6.25 m up a ramp that makes an angle of 18.5 degrees with the horizontal. He exerts a force of 475 N on the crate, parallel to the ramp, and the crate moves at a constant speed. Calculate the work, in Joules, that the man performs to cause himself and the crate, to move up the ramp.

1. 8290 J
2. 4750 J
3. 8580 J
4. 1190 J