Write each set in the indicated form. If you need to use ellipsis (...) to indicate a pattern, make sure to list at least the first four elements of the set.
(a) Set-builder form: {x | x is a natural number and 22 < x < 26}
Roster form:
(b) Roster form: {4, 5, 6, 7, ...}
Set-builder form: (Choose one)