9.Q. Interpret the concepts introduced in this section for the Cantor set F of Definition 7.4. In particular (a) Show that F is closed in R. (b) There are no interior points in F. (c) There are no non-empty open sets contained in F (d) Every point of F is a boundary point (e) The set F cannot be expressed intervals (f) The complement of F can be expressed of open intervals as the union of a countable collection of closed as the union of a countable collection