How do I get the answer that's in the brackets

A castle drawbridge (m = 350 kg) is 8.20 m long, and rotates on hinges attached wall. The end of the bridge is held up by a cable that makes a 350 angle with the bridge. A 120-kg knight stands on the bridge 6.40 m from the wall. If the drawbridge is horizontal and at rest, how much force does the cable exert? [4590 N] e above the other, without touching. Bo