Английский! Пожалуйста, помогите хоть с каким нибудь предложением! (Там где correct)

1.You will be healthier if you smile a lot.
2.You will be more energetic if you get a little exercise every day.
3.I f you do something worse than your friend, don't panic.
4.Jane was the oldest in the group.
5.Last summer was hotter than now.
6.Alex was fitter than his friends.