https://www.chegg.com/homework-help/questions-and-answers/1-30-pts-consider-primary-key-based-normalization--given-relation-r-b-c-d-e-f-g-h-j-primar-q37197690
https://www.chegg.com/homework-help/questions-and-answers/2-10-pts-given-following-table-primary-key-underlined-products-productid-productname-price-q37281711