A spaceship and its occupant have a total mass of 150,000kg. The occupant would like to travels to a star that is 25 light-years away at a speed of 0.60c. to accelerated, the engine of the spaceship changes mass directly to energy. How much mass will be converted to energy to accelerate the spaceship to this speed? Assume the acceleration is rapid, so the speed for the entire trip can be taken to be 0.60c, and ignore decrease in total mass for the calculation. How long will the trip take according to the astronauts board?