*Please help asap taking a test!* (Thank you!) :D Max saw the following problem: 3 · (3 + 12 ÷ 3) - 4 The first thing he did was add 3 + 12 to get 15. What is Max's error?

-He should have multiplied 3 · 3 first
-He should have subtracted the 4 first
-He should have divided 12 ÷ 3 first
-He did the correct thing first

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?