Hello i would like some help with this question please thank you.

An aircraft (at Z) is spotted by two observers (at X and Y) who are L = 1550 feet apart. As the Z airplane passes over the line joining them, each observer takes a sighting of the angle of h elevation to the plane, as indicated in the figure. B If A = 35 , and B = 35", how high is the XA D Y airplane? L The elevation of the plane is approximately feet. (Do not round until the final answer. Then round to two decimal places as needed.)