For expressions based on the given Venn diagram, where the letters g, b, c, d, e, h represent the number of elements in each region.

Here are the solutions to the questions.

Question 1:
The question asks for expressions based on the given Venn diagram, where the letters g, b, c, d, e, h represent the number of elements in each region.

a) $n(P \cap Q)$ is the number of elements in the intersection of P and Q.

$$n(P \cap Q) = \boxed{b}$$

b) $n(P \cup Q)'$ is the number of elements outside the union of P and Q.

$$n(P \cup Q)' = \boxed{d+e+h}$$

c) $n(P \cap Q)'$ is the number of elements outside the intersection of P and Q.

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