Please help with geometry!!

Use the figure shown for exercises 1-10.
1. Name the center of the circle.
2. Name a radius.
3. Name a chord.
4. Name a secant.
5. Name a tangent.
6. Find m2 OCD.
7. If PQ = 12 units, find XQ.
8. Name a central angle.
9. Name an inscribed angle.
10. If OQ = 26 units, find oC.