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

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

Set `A = \{4,5,6,7,9,10,11,14,16,17,18,19}`

Set `B = \{1,7,8,10,13,14,17,18,19,20}`

Determine the following:


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