Write the class MagicSquare with instance methods given in the next few slides. MagicSquare should have an instance 2D array variable square. MagicSquare should have a constructor that accepts a 2D array. The methods rowSum, colSum, diagSums and exactlyOnce are intermediate methods to help you write the isMagic method, which determines whether a square is magic. You must use the method headers indicated for each method. Write a driver class with a main method to test your MagicSquare class.