2. A circular walkway is to be built around a monument, with the monument as the center. The distance from the monument to any point on the inner boundary of the walkway is 30 feet. a. What is the equation of the inner boundary of the walkway? Use a coordinate system with the monument at (0, 0). b. If the walkway is 7 feet wide, what is the equation of the outer boundary of the walkway?

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