Hi there! Welcome to the forum. There’s already a thread for this event right here: Puzzle Arena hints/solutions (8/28/2019 - 9/3/2019)
All the answers have been spelled out here. Just post any additional questions you have in this thread. For future reference, if you have something you want to ask about, try looking through the recent forum posts to see if there’s already a thread for it before posting your own. We just want to avoid clutter and redundancy is all. Hope you understand.