Describe how Obierika proves to be a true friend to Okonkwo, even after Okonkwo is exiled.

Obierika brings the money from Okonkwo's seed-yams to him, and even arranges share-cropped to plants Okonkwo's yams while he is away. Obierika brings all the cowries from the crop to Okonkwo. He is also the only one who thinks Okonkwo's punishment was too harsh.