Correct the mistakes in the following sentences.

1)You will be more healthier if you smile a lot.
2)You will be most energetic if you get a little exercise every day.

3)If you do something bad than your friend,don't panic.You may be more better in something else.

4)Jane was the eldest in the group.

5)Last summer was more hot than now.

6)Alex was more fitter than his friends.