Exploring eBay car sales data. expoloring price by brands

please can someone explain how am going to explore the price by brand?, I don’t really understand how am to generate the frequency table of the brand and mean price.
Thanks

Hi, I just replied to your other post and this post has the same problems, I believe.

You need to help people to help you.

My reply to the other post:

Hi, can you be more specific about the problem?

It is important to post a link to the mission, the code you are trying to run, what you expect from that code and what you are actually getting.

A well-formulated question helps you to get more helpful answers. You can see more about how to ask a good question here.