The given set is
To write it in the Roster Form, we will list the elements
The given st is
We will write it in the set-builder form
This means we need to write it in the form of inequality
Since the numbers are from -6 to -1, then
The answers are
a) {-3, -2, -1, 0, 1, 2, ..........}
b)
The 3rd choice