Looking at the following Image, please explain all aspects of the relationship between INVOICE and PRODUCT.

SEMINAR CUSTOMER \begin{tabular}{|l|l|l|} \hline SeminarlD & & EmailAddress \\ \hline SeminarDate & & LastName \\ SeminarTime & & FirstName \\ Location & & Phone \\ SeminarTitle & & StreetAddress \\ \hline & & City \\ & & State \\ & ZIP \\ \hline \end{tabular} CONTACT INVOICE LINE_ITEM PRODUCT ProductNumber Description UnitPrice QuantityOnHand