8. ( Possible or impossible? ) Give an example of each, or state that the request is impossible. When a request is impossible, explain why that is the case. You may use definitions or theorems from the textbook in your explanation. (c) A collection of nested closed intervals /1 2 12 2 13 2 ... whose intersection ,In is uncountable. (d) A set A C R such that for every r E A, there exists a y E A satisfying y sup B