Can someone help me with this problem

1.From a 35 meter high window , the angle of depression to the top of a nearby streetlight is 55*. The angle of depression to the base of the streetlight is 57.8*. how high is the streetlight?

so far the only result I have come up with is 2.46 m, which is wrong! please don't use either law of sines or law of cosines to solve this problem ! Thanks