Write the following methods in a Java program: a) A Java method fillArrax0 that shall fill a 2D array from the keyboard. The method input parameters b) A Java method printArrav that shall print the elements of 2D array. The method input parameters c) A Java method multiply_ScalarMatrix0 .This method shall print the result of multiplying a 2D array d) A Java method multiply MatrixOThis method shall print the result of multiplying a 2D array with are an array A and the array size. (2 marks) are an array A. (2 marks) by a number. The method parameters are: array A and the number n. (3 marks) another 2D array number. The method parameters are: array A and array B (3 marks) Hint: To multiply 2 matrices? Step 1: Make sure that the number of columns in the 1st one equals the number of rows in the 2nd one. Step 2: Multiply the elements of each row of the first matrix by the elements of each column in the second matrix Step 3: Add the products