Sarah and John have spent all morning climbing Mt Coot-tha and are enjoying the view at the top of the mountain whilst eating lunch. At 1:30pm a group of 80 tourists reach the top of the mountain and sit down in front of Sarah and John, blocking their view. Select the item from the list provided to make the following statements true.
Prior to 1:30pm, the view from Mt Cootha for Sarah and John is a _____ good

1. 0
2. Common
3. Collective
4. Binary category to become
5. Tragedy of the Commons
6. Non-rivalrous
7. Excludable good.
8. Rivalrous
9. Private
10. 0
11. Public
12. Spectrum