Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options.
1. The radius of the circle is 3 units.
2. The center of the circle lies on the x-axis.
3. The center of the circle lies on the y-axis.
4. The standard form of the equation is (x – 1)² + y² = 3.
5. The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.