What could be the right way to solve this?

I am trying by putting $y^2$ value from equation 1 to equation 2.

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Let $y^2-4ax+4a=0$ and $x^2+y^2-2(1+a)x+1+2a-3a^2=0$ be two curves. State which one of the following statements is true.

- These two curves intersect at two points
- These two curves are tangent to each other
- These two curves intersect orthogonally at one point
- These two curves do not intersect