The drawing shows box $1$ resting on a table, 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 $W_1=54\mathrm{.}3N,W_2=38\mathrm{.}6N,$ and $W_3=26\mathrm{.}8N.$ Determine the magnitude of the normal force that the table exerts on box $1.$

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