Write a method in Java that has as parameters: a two dimensional array of integers (representing the matrix A); an array of integers, representing the vector B, and an integer number (column) indicating the number of the column of matrix A. The method needs to return the sum of vector B and the specific column from A. The result will be a one dimensional array. For example, suppose: A = , B = [ 4 3 1], column =1. The method will return the array [7 7 9], which is the sum of column 1 of the matrix A and vector B. The method should check if the column is valid. For example, in the example above, the valid values for column are 0, 1 and 2. If column is not valid, the method should return null.