Simple Java! Thank you

Write a method that takes two 1D int array and returns a new 1D array combining those two arrays. public static int[] merge(int[] a, int[] b) Write a method that takes a 2D array and prints the elements of the array only when the element is odd. public static void printodd (int[][] mat) Complete the following method that takes a 2D int array as parameter and prints the sum of each row if the sum is less than 100 public static void printSum (int[][] mat) Complete the following method that takes a 2D array of int as parameter. The method prints the first and last rows and first and last columns of the array public static void printFirstLast (int[] [] mat)\{ Write a method that takes an 2D int array as parameter and returns true if the array is ragged, false otherwise. publicstaticBooleanisRagged(int[][]r){