Write each set in the indicated form.
If you need to use "..." to indicate a pattern, make sure to list at least the first four elements of the set.
(a) Roster form: {6, 7, 8, 9, ...}
Set-builder form: {x | x is a natural number and x <= 10}
(b) Set-builder form: {y | y is a natural number and y <= 3}
Roster form: