Help me study for my MySQL class. I’m stuck and don’t understand.

5. Get all DNum/VNum/INum triples such that the indicated Disease, Vaccine and Ingredient are all colocated (associated with the same city). (This doesn’t use the Treats table.) 6. Get all DNum/VNum/INum triples such that the indicated Disease, Vaccine and Ingredient are not all co-located (associated with the same city). (This doesn’t use the Treats table.) 7. Get all DNum/VNum/INum triples such that no two of the indicated Disease, Vaccine and Ingredient are co-located (associated with the same city). (This doesn’t use the Treats table.) 8. Get Vaccine numbers for Vaccines that treat a Disease whose origin is NYC. 9. Get Vaccine numbers for Vaccines that treat a Disease whose origin is NYC using an Ingredient sourced from NYC. 10. Get all pairs of city names such that a Disease from the first city is treated by something using an Ingredient sourced from the second city