I need help with the following 3 questions.

In #4, please explain your answer and use vectors or diploes.

4. Indicate whether the following molecules are polar or non-polar and provide your reasoning. (HINT: use vectors or dipoles) 5. Rank the following atoms in order of increasing electronegativity (EN), least EN most EN. N, P, Si, O, C, H 6. Draw the step by step Lewis structure for ozone, O3. Circle the most stable form of the structure