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

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

Set `A = \{2,5,7,8,13,15,19}`

Set `B = \{1,2,3,6,8,9,10,12,13,14,16,18,20}`

Determine the following:


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