### Question:
Point extends Coordinate { public double norm2() { return x*x + y*y + z*z; } Point();  Point(double x, double y);  Point(double x, double y, double z);  Point(double[] xyz);  Point(Point c);  Point(Coordinate c); Point min(Point p); Point plus(Point p); Point mult(Point p); Point div(Point p); double in(Point p); Point out(Point p); Point multByScalar(double scalar); Point divByScalar(double scalar); Point negative(); double norm2(); double norm(); Point normalize(); double angle(Point p); Point scale(double scalar); @Override double distance(Coordinate p); void toScreen(); double[] toArray();  }### Answer:
@Test public void testNorm2() throws Exception { testDouble = X.norm2(); refDouble = 14; assertEquals(refDouble, testDouble); }