Please help me with this question

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

I’m which figure is point g an orthocenter