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An ellipse sliding along coordinate axes...

An ellipse sliding along coordinate axes.If the foci of ellipse are `(1,1)` and `(3,3)` .Then which of the following is/are correct?
Radius of director circle of ellipse is `2sqrt(2)`
Length of major axis of ellipse is `2sqrt(5)`
Length of minor axis of ellipse is `sqrt(3)`
Length of major axis of ellipse is

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