We consider the set A of all integers in {1, . . . , 40} with
exactly two (different) prime factors. Write down A as a list of
elements separated by commas and enclosed by braces.
3. (5 pt) We consider the set A of all integers in {1,..., 40} with exactly two (different) prime factors. Write down A as a list of elements separated by commas and enclosed by braces.