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

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

Set `A = \{1,4,5,6,7,8,9,13,14,15,16,17,19}`

Set `B = \{1,2,5,6,10,11,19}`

Determine the following:


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