Need WordPress Developer

Need someone to help me make incremental updates to my wordpress installation. The setup is a custom theme and a custom plugin. The tasks are simple, example include: make category view display only titles instead of whole articles; change the styling of “categories” tree on homepage.

In your response, please answer the following: [1.] What’s 4 / 3 + 9 ? [2.] If creating a shortcode, what file are you changing? What’s the php function to register the new shortcode? [3.] How would I add coordinates (two new fields, x, and y) to a post? [4.] Optional: Let’s say I want one category, “Features”, do have different style than all other categories. How would I implement that?

Thanks, I look forward to reading your submissions!