So this is the triangle I'm dealing with.

I have to find the measures of the angles x & y.

First thing I tried to do was find the measure of the angle @ A.

a/SinA = c/SinC

66/SinA = 25/Sin10.5

and then I end up with 28 degrees for the angle @ A. Maybe I'm looking at it the wrong way but beyond that I have no idea how to proceed with this question.

Any help ?