How will the area of the rectangle change if: 1) reduce one of its sides by 5 times;

How will the area of the rectangle change if:
1) reduce one of its sides by 5 times;
2) increase one side by √20 times, and the other by √5 times;
3) enlarge one side by 8 times, and reduce the other by 2 times?

1) decrease by 5 times, 2) increase by 10 times 3) increase by 4 times

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