ok, spoilers below:
on lv8, ì you know how to type on old phones like nokias, then thats how that works. if you dont know, then search up how to type on those old phones bc im too lazy to explain.
if you want the answer, its emergency.
unfortunately, idk how to do lv9.
on lv10, the chemical formula is h2o. why? bc is written H to O (hjklmno).H2O is the chemical formula for water.
the answer is water.
on lv11, the lv number is 11 and you need it to be convinient. whats convinient and has an 11 in it? seven-eleven. so, the number that makes it convinient is 7.
type in 7 and you are done :)