Determine the validity of each statement by selecting True or False.

select True False  1. The number $-\frac{48}{79}$ is rational

select True False  2. The number $\frac{\pi}{2}$ is rational

select True False  3. The number $0$ is a natural number

select True False  4. The number $\sqrt{37}$ is rational

select True False  5. The number $63$ is an integer, but not a whole number