If A and B are two sets such that n(A)=12, n(B)=19 and `(A cup B)=26` then find.
(a) `n(A cap B)`
(b) `n(A-B)`
(c) `n(B-A)`

Explanation

To solve the problem step by step, we will use the properties of sets and the formulas related to the union and intersection of sets.

Given:
- \( n(A) = 12 \)
- \( n(B) = 19 \)
- \( n(A \cup B) = 26 \)

We need to find:
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