Please help me anyone

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

Sandy is ordering bread rolls for her party,she wants 3/5 of the rolls to be whole wheat. what other factions can represent part of the rolls that will be whole wheat? shade the models to show your work.

Prove that 16^4-2^13-4^5 is divisible by 11.