The mast of a sailboat is supported at the bow and stern by stainless steel wires, the forestay and backstay, anchored 10 m apart. The 12.0-m-long mast weighs 800 N and stands vertically on the deck of the boat. The mast is positioned 3.52 m behind where the forestay is attached. The tension in the forestay is 482 N. Find the tension in the backstay and the force that the mast exerts on the deck.