Let $S = \{ 0, 1, 5, 4, 7 \}$. Then the total number of subsets of $S$ is

Write the following set in roster form:
$D = \{ x : x \text{ is a prime number which is a divisor of } 60 \}$

List all the elements of the following set:
$E = \{ x : x \text{ is a month of a year not having } 31 \text{ days} \}$

State which of the following sets are finite or infinite:
$A = \{ x : x \in \mathbb{N} \text{ and } x \text{ is prime} \}$

Which of the following is not an example of the null set?

Write the following set in the set-builder form: $\{ 2, 4, 8, 16, 32 \}$