public static boolean isMagic(int[][] a){
        boolean isMagic=isRowMagic(a)&&isColumnMagic(a)&&isSquare(a);
        int diagonalSum1=0;
        int diagonalSum2=0;
        int[]rowSums=allRowSums(a);
        int[]colSums=allColSums(a);

        for(int i=0; i<a.length; i++){
            diagonalSum1+=a[i][i];
            diagonalSum2+=a[i][a[i].length-1-i];
        }

        boolean diagonalsSame=diagonalSum1==diagonalSum2;
        boolean rowsColsSame=rowSums[0]==colSums[0];
        boolean diagonalsAndRowsColsSame=rowSums[0]==diagonalSum1;

        return isMagic && diagonalsSame && rowsColsSame && diagonalsAndRowsColsSame;
    }