The planet Omicron Persei-8 has 3 moons, Abbey, Burt and Clyde that have nearly circular orbits. Measurements of the periods of the three moons are 21 days for Abbey, 35 days for Burt and 61 days for Clyde. It is further known that Abbey has a distance of 21,000 Km from the center of Omicron Persei-8. From this information determine the distance of Burt and Clyde from Omicron Persei-8