Let `S` be the universal set, where:
`S = {1,2,3,...,18,19,20}`
Let sets `A` and `B` be subsets of `S`, where:

Set `A = \{1,2,3,6,8,9,10,14,15,17,18}`

Set `B = \{3,4,9,10,18,19}`

Set `C = \{4,5,9,10,12,13,19,20}`

Find the number of elements in the set `(A \cup B \cup C)`
`n(A \cup B \cup C)` =

Find the number of elements in the set `(A \cap B \cap C)`
`n(A \cap B \cap C)` =

You may want to draw a Venn Diagram to help answer this question.