Howdy! Both sentences are correct and have the same meaning. They might have subtle differences in meaning depending on the context, but both sentence structures work perfectly in any situation. Use whatever is comfortable to you! Have fun learning! P.S. If the group (or object) is already known, you can save time and avoid redundancy by saying "what do you all do?" Or "what do you do?"

Both are correct. More common is "What does your group do?" for general information or "What does each person do?" for specific information about the roles of people.

They are both fine but the second sounds more natural.

They are both grammatically correct. The meaning of the the first sentence is very clear. In the second sentence, the meaning is less clear. It could refer to the people who are not in your group.

The Second one is Rigorous but also the first Helps