Find the lettered angles in the diagram. The diagram shows a circle with a five-pointed star inscribed in it. Angles a, b, c, 32°, and 40° are marked.

Here's how to find the lettered angles:

For Circle 1:
The angles $a, b, c, 32^\circ, 40^\circ$ are angles subtended by arcs at the circumference.
Let the vertices of the star-shaped polygon on the circle be $V_1, V_2, V_3, V_4, V_5$ in clockwise order, starting from the top vertex.
The angle $40^\circ$ is at $V_1$ and subtends arc $V_3V_4$.
The angle $a$ is at $V_2$ and subtends arc $V_4V_5$.
The angle $32^\circ$ is at $V