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 = \{2,3,4,6,7,8,9,10,12,14,16,20}`

Set `B = \{1,2,4,5,6,13,14,15,20}`

Set `C = \{1,2,7,10,13,20}`

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.