$$ Create an Excel table named "MonthlySales" with columns: "Month" and "Sales."

$$ Populate the table with provided data.

Month Sales

Jan $100$

Feb $150$

Mar $120$

Apr $200$

a$)$ Describe the importance of formatting in data visualization.

b$)$ Create a well$-$formatted chart using the "MonthlySales" table to represent the data visually.