Can you show me the answers in steps please

Can you answer my question? will mark brainiest!

I’m which figure is point g an orthocenter

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online