Mathematics

Problem

Classify the following sets into finite set and infinite set. In case of finite sets, mention the cardinal number. a.

A = \{x : x \in I, x < 5\}

. b.

A = \{x : x \in W, x \text{ is divisible by } 4 \text{ and } 9\}

. c.

P = \{x : x \text{ is an even prime number } > 2\}

. d.

F = \{x : x \in N \text{ and } x \text{ is a factor of } 84\}

. e.

F = \{x : x \in N \text{ and } x \text{ is a factor of } 84\}