Area of segments in a circle.

The radius of the circle is 11
The radius of each arc's circle is 16.

Solve for the area of sector's 1,2,3 and 4

I did some math and found the area's of section 4 and 3 I THINK they are:
Area of 4 = $45.539units^2$
Area of 3 = $79.428units^2$

but i seem to be having a hard time finishing the problem, and finding excally were the 3rd arch intersects the circle.. Any help would be nice - and i would like to make sure my current numbers are correct as well.