Write a method to multiply two matrices. The header of the method is: public static double[][] multiplyMatrix(double[][] a, double[][] b) To multiply matrix a by matrix b, the number of columns in a must be the same as the number of rows in b, and the two matrices must have elements of the same or compatible types. Let c be the result of the multiplication. Assume the column size of matrix a is n. Each element is For example, for two matrices a and b, c is where Write a test program that prompts the user to enter two matrices and displays their product. Write in java language, with comments and display a flowchart.