### Question:
SpaceAge { double onMercury() { throw new UnsupportedOperationException("Delete this statement and write your own implementation."); } SpaceAge(double seconds);   }### Answer:
@Ignore("Remove to run test") @Test public void ageOnMercury() { SpaceAge age = new SpaceAge(2134835688); assertEquals(280.88, age.onMercury(), MAXIMUM_DELTA); }