Assuming that straight lines work as the plane mirror for a point, find the image of the point (1, 2) in the line `x - 3y + 4 = 0`.

Explanation

To find the image of the point (1, 2) in the line given by the equation \(x - 3y + 4 = 0\), we can follow these steps:

### Step 1: Identify the line equation and point
We have the line equation:
\[ L: x - 3y + 4 = 0 \]
And the point \(P(1, 2)\).
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