Consider the following trade network for Paprika.
\table[[Exporter,Importer,Trade volume],[Korea,Japan,],[Korea,China,10],[Japan,Korea,2],[Japan,9,],[Korea,5,]]
China
China
(1) Generate the adjacency matrix. (Fill in the blanks)
\table[[Country,Korea,Japan,China],[Korea,,,],[Japan,,,],[China,,,]]
(2) Fill in the blanks.
\table[[Country,In-degree,Out-degree,In-strength,Out-strength],[Korea,,,,],[Japan,,,,],[China,,,,]]
(3) Explain which country serves as a hub for paprika trade.