Show that the points `A (2, -3, -4)`, `B (1, 2, 3)`and `C (3, -8, -11)`are collinear.

Explanation

To show that the points A(2, -3, -4), B(1, 2, 3), and C(3, -8, -11) are collinear, we need to demonstrate that the vectors AB and BC are parallel. This can be done by showing that the direction ratios of these vectors are proportional.

### Step-by-step Solution:

1. **Find the coordinates of vectors AB and BC:**
- The vector AB can be found using the formula:
\[
\overrightarrow{AB} = B - A = (1 - 2, 2 - (-3), 3 - (-4))
...