classPoint(xc:Int, yc:Int) extends Equal {varx:Int= xcvary:Int= ycdef isEqual(obj: Any) =obj.isInstanceOf[Point] &&obj.asInstanceOf[Point].x == x} objectTest {def main(args: Array[String]) {valp1 = new Point(2,3)valp2 = new Point(2,4)valp3 ...