Find the intercepts of the plane $3 x+ y +9 z = 27.$ Write your answers as points $(a,b,c)$ where $a$, $b$, and $c$ are numbers.

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1. The $x$-axis intercept.
Answer:

2. The $y$-axis intercept.
Answer:

3. The $z$-axis intercept.
Answer:

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Note: If there is no intersection, write "none".