Answer Happy

need help on this problem that i got wrong
A cable is used to hold up a weightless gate that contains water. Point A is a hinge such that the gate can rotate about that point. The water level is at h = 4.6 ft and the following lengths are given as L1 = 9.0 ft and L2 = 7.4 ft. How much tension is the cable under to keep the water inside? The gate has a width of 3.4 ft. Cable Water Gate Hinge
Correct Answer 989.671 margin of error +/- 10%