Distance from mirror

A dressing mirror mounted on a vertical wall is \( 1.7 \text{ m} \) tall with the bottom \( 0.3 \text{ m} \) above the floor. A bare light-bulb hangs on the ceiling with a horizontal distance of \( 1.0 \text{ m} \) away from the wall with the mirror. The light-bulb is \( 3.0 \text{ m} \) above the floor. Approximately how long is the streak of the reflected light across the floor, as measured perpendicularly away from the wall with the mirror?

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