For each of the following products, please explain if the Heckscher-Ohlin theory of trade explains the pattern of trade of the product. Also, please compute the intraindustry trade share for the product. Please note you can find the total US imports and exports of the product at the top of the tables linked below:

a. Coffee (HS code 0901)

Exports: https://oec.world/en/visualize/tree_map/hs92/export/usa/show/0901/2020/

Imports: https://oec.world/en/visualize/tree_map/hs92/import/usa/show/0901/2020/

b. Corn (HS code 1005)

Exports: https://oec.world/en/visualize/tree_map/hs92/export/usa/show/1005/2020/

Imports: https://oec.world/en/visualize/tree_map/hs92/import/usa/show/1005/2020/

c. Tractors (HS code 8701)

Exports: https://oec.world/en/visualize/tree_map/hs92/export/usa/show/8701/2020/

Imports: https://oec.world/en/visualize/tree_map/hs92/import/usa/show/8701/2020/

d. Perfume (HS code 3303)

Exports: https://oec.world/en/visualize/tree_map/hs92/export/usa/show/3303/2020/

Imports: https://oec.world/en/visualize/tree_map/hs92/import/usa/show/3303/2020/