C. Determine the center and radius of each circle in general form. Then draw its graph. 1. x² + y² - 4x - 2y -4 = 0 2. x² + y² - 10x + 2y = 0 3. x² + y² + 4x - 6y - 12 = 0 4. x² + y² + 12x - 12y +36 = 0 5. x² + y² - 10x - 2y-3 = 0

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