Show that the points A(1, 2, 7), B(2, 6, 3) and `C(3, 10 , 1)`are collinear.

Explanation

To show that the points A(1, 2, 7), B(2, 6, 3), and C(3, 10, 1) are collinear, we will find the vectors AB and AC and check if they are scalar multiples of each other.

### Step 1: Find the vector AB
The vector AB can be calculated using the coordinates of points A and B.

\[ \text{AB} = B - A = (2 - 1, 6 - 2, 3 - 7) = (1, 4, -4) \]
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