An aquarium is 6900 cubic inches. Nathan wants to populate the aquarium with neon tetras and catfish. It is recommended that each neon tetra be allowed 170 cubic inches and each catfish be allowed 700 cubic inches of spaces. Nathan would like at least one catfish for every 4 neon tetras. Let x be the number of neon tetra and y be the number of catfish. Write the system of inequalities that describe the constraints.