Planet Marietta has a very large moon called Smyrna-4. The radius of planet Marietta is 24,000 km. The radius of the moon Smyrna-4 is 4,800 km. The mass of planet Marietta is 3.50x10^25 kg. The mass of moon Smyma-4 is 8.70x10^22 kg. The physical distance between their centers of mass is 300,000 km. Calculate the gravitational attraction force between Planet Marietta and its moon. Smyrna-4. Show your work.