Java question

a. [6 points] Define the fosterial function f(n, k) as follows: f(1, k) = f(0, k) = 1 If n> 1 and n is not divisible by k, f(n, k) is the product of f(n - 1, k) and If n > 1 and n is divisible by k, f(n, k) is the product of f(n - 1, k), and n f(n - 2, k). osterial below according to its specification. /**Return the fosterial value f (n, k). * Precondition : n >= 0, k > 0 */ public static int fosterial (int n, int k)