Write the following intervals in set builders form
(i) `(-6x-3)`
(ii) `[4,15]`

Explanation

To convert the given intervals into set builder form, we will follow these steps:

### Step 1: Convert the first interval `(-6, -3)` into set builder form.
- The interval `(-6, -3)` indicates that x can take any value between -6 and -3, but not including -6 and -3 themselves.
- In set builder notation, we express this as:
\[ \{ x \mid x \in \mathbb{R}, -6 < x < -3 \} \]
...