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Mandy is twice as old as Jessica. Three years ago, Mandy was three times as old as Jessica was then. What are the ages of the girls?

(1) Mandy is 3 and Mandy is 6.

(2) Mandy is 6 and Jessica is 3.

(3)Mandy is 6 and Jessica is 12.

(4) Mandy is 12 and Jessica is 6