How to draw lewis structure

Question

Assignment:

Perform steps a-d for the molecules described below in (e):

a.) Draw the Lewis structure.
b.) Count and give the number of regions of high electron density that exist around the central atom.
c.) Identify the most stable arrangement of the regions of high electron density.
d.) Diagram and name the type of structure that the molecules has based on positions of the atoms.
e.) CH₃- ; SO₃; SF₆ ; ClF₃; SF₄; ICl₄; XeF₄;I₃-; and NO₂^-

Predict the polar or non-polar characteristics of the molecules listed in 1-e.

Provide complete and step by step solution for the question and show calculations and use formulas.