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

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

Set `A = \{4,7,8,12,14,18,19}`

Set `B = \{1,6,7,8,9,10,12,15,16,17,18,20}`

Determine the following:


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