Just be yourself and answer with reference to previous experience you may have had.
Say what they want to hear even if you don't think it's the right thing to say. DO NOT tell the truth about everything. Managers expect you to lie in interviews however they themselves normally have extremely fragile egos so if you do not immediately say everything they want to hear, they won't be interested. Don't end up like me not getting the job after you were interviewed by a psychopath who made a personal attack on everything you said because it wasn't what they wanted to hear. ALWAYS say what they want to hear regardless of whether you think it's the right thing to say.
Breath, don't think about it too much and just to answer clearly and honestly
Be focused and be confident
Its a group interview so show good teamwork skills. be friendly most importantly. be both independent in coming up with ideas in a group task but also dont be a know-it-all. managers are very chill, easy going people and its a more relaxed environment, but in saying that you still need to show you are hard working and up for tasks. the laid-back environment is what makes it comfortable to work, but you still gotta work aha