3. co се ни 4.

The provided image contains text snippets that appear to be part of a numbered list or exercise. However, without the full context or clear instructions for these snippets, it is impossible to provide a specific solution or answer.

To effectively address this, please provide the complete question or exercise that these text fragments belong to. For example, if this is a math problem, please include the full equation or problem statement. If it's a language exercise, please provide the sentence or text where these words are meant to be used.

Once the full context is available, I can provide a detailed and accurate solution.