Which of the following are statements 1 She is a mathematics

Which of the following are statements?
1. She is a mathematics major.
2. 128=2^6
3. The temperature on the surface of the planet Venus is 600 degrees F.
4. Sleep tight and don’t let the bedbugs bite.

1. Statement 2. Not a Statment 3. Statement 4. Statement
I would just like to double check my answers.
Thank you !