Question

Two birds sit at the top of two different trees 17.8 feet away from one another. The distance between the first bird and a bird watcher on the ground is 37.4 feet. What is the angle measure, or angle of depression, between this bird and the bird watcher?
(image being added shortly)

a.) 25.5 degrees
b.) 28.4 degrees
c.) 61.6 degrees
d.) 64.5 degrees