Show me the steps to solve $4.$ Modify and update a paragraph style as follows to call attention to the topics in the "First Steps" section:

a$.$ Change the character spacing of the text in the "Refine Your Business Idea" heading to Expanded by $1\mathrm{.}2$ point.

b$.$ Change the font color of the "Refine Your Business Idea" heading to Red, Accent $1,$ Darker $50\%.$

c$.$ Update the List Heading paragraph style to reflect the formatting changes.