Help me solve this for 100 POINTS:

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

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =