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

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

Set `A = \{2,3,4,5,8,9,10,12,14,15,16,18,20}`

Set `B = \{1,2,7,9,10,12,13,15}`

Determine the following:


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