The Oath Augmentation Challenge

Welcome members, to the Oath Augmentation Challenge!

Decode and answer all three riddles to unlock a download of the Royal Order of the Holy Mackerel's Motto!

KEY: D=1 A=B

HINT: If you're stuck, try searching the Gravity Falls Wiki for the answers!

Question 1
Taht eta I fi wol wen a eb ti dluow?


Question 2
Lennalf evol lla yeht dnA.


Question 3
Lobmys emas siht dah sgnilbis seniP eht fo htob ekil smees ti, gnitoohs ton s'ti hguoht.