[HELP] How to post DIFFERENT ads for Different categories in WordPress?

I have a WP blog and I have 3 categories.

I want to display different ads for different categories post.

Example:

Cpa Banner 01 for post in category 01
Cpa Banner 02 for post in category 02
Cpa Banner 03 for post in category 03


Someone can help me?
Thanks

You need to customly edit it.
Where exactly you want to show? placement area?
Can you provide url , so its easy to gave you solution?

I need to show ads before the article