What is the exact circumference of a circle with a diameter of 17 inches

I need help with 2 math problems, please!

Problem 1 - What is the exact circumference of a circle with a diameter of 17 inches?
1. 17p inches
2. 34p inches
3. 8.5p inches
4. 72.25p inches
5. 289p inches

Problem 2 - Given the diagram below, find P ∩ Q. Write in correct set notation.
Diagram: http://www.flickr.com/photos/62474130@N0…

C = 17π in.