Several forms of negation are given for each of the following statements. Which are correct?

a. The answer is either 2 or 3.

1. Neither 2 nor 3 is the answer.

2. The answer is not 2 or not 3.

3. The answer is not 2 and it is not 3.

b. Cucumbers are green and seedy.

1. Cucumbers are not green and not seedy.

2. Cucumbers are not green or not seedy.

3. Cucumbers are green and not seedy.

c. \(2<7\) and 3 is odd. 

1. \(2>7\) and 3 is even. 

2. \(2 \geq 7\) and 3 is even. 

3. \(2 \geq 7\) or 3 is odd. 

4. \(2 \geq 7\) or 3 is even.