Can someone help me this is very hard

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

I’m stuck on this equation, anyone got the answer?

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.