Final answer:
The roster form for the first set is {1, 2, 3} and for the second set is {81, 82, 83, ..., n}, where 'n' indicates continuation of the natural numbers greater than 80.
Step-by-step explanation:
The question requires writing sets in roster form based on given conditions. The first set is x is a whole number between 0 and 4. Since whole numbers include 0 and all positive integers, the roster form of this set is {1, 2, 3}, excluding 0 and 4 as the condition specifies between 0 and 4, not including 0 and 4.
The second set is x . Natural numbers are positive integers starting from 1. For the roster form, we will list natural numbers greater than 80, but as there are infinitely many, we'll represent only a few and write an ellipsis (…) to indicate that the list goes on indefinitely. Thus, the roster form is {81, 82, 83, ..., n}, where 'n' represents any natural number greater than 80.