Question* 61. Tll the drawing shows box 1 resting on a tabl with box 2 resting on top of box 1. A massless rope passes over a massless, frictionless pulley. One end of the rope is connected to box 2 , and the other end is connected to box 3. The weights of the three boxes are $W_{1}=55 \mathrm{~N}, W_{2}=35 \mathrm{~N}$, and $W_{3}=28 \mathrm{~N}$. Determine the magnitude of the normal force that the table exerts on box 1 .