Let `S = {1,2,3,...,18,19,20}` be the universal set.

Let sets `A` and `B` be subsets of `S`, where:

Set `A = \{2,3,5,6,7,8,10,13,14,16,17,18,19}`

Set `B = \{3,4,5,7,8,9,13,16,18,19}`

Determine the following:


`n(A)=`
`n(B)=`