A few questions about the "In Post Ads" plugin. How

Hi
A few questions about the "In Post Ads" plugin.

How to control size of in post ads?
What does "enable custom ads" and "style inclusion type" do?
What is the ad link or "Link URL" on the right used for?
What is the recommended way to integrate google adsense with in post ads? Is it using the following plugin?http://wordpress.org/plugins/wordpress-plugin-for-simple-google-adsense-insertion/