I want to get questions related to a specific tag with the body of those questions. I have figure out this API request:

    https://api.stackexchange.com/questions?site=stackoverflow&sort=votes&tagged=scalability&filter=withbody

I want to specify two more things:

* The number of returned questions, let's say 50 questions and 

* I don't want some attributes returned by the API such as `owner`, Can I exclude this field?