Write each set in the indicated form. If you need to use "..." to indicate a pattern, make sure to list at least four elements of the set:
As you answer below, remember that the natural numbers are just the counting numbers. This means that 0 is not a natural number, and negative numbers are not natural numbers either.
(a) Roster form: {1, 3, 5, 7, ...}
Descriptive form: (Choose one)
(b) Descriptive form: The set of natural numbers greater than or equal to 4 and less than or equal to 6.
Roster form: