A solid metal rod passes through the hull of a crewed spacecraft. One end of the rod is flush with the interior cabin wall at 300K, where air is continuously circulated by fans. The other end protrudes directly into the 3K vacuum of space. Identify the dominant thermal energy-transfer mechanism for heat leaving (i) the inner end of the rod into the cabin, (ii) along the length of the rod, and (iii) from the outer tip into space. Justify each choice in one or two sentences.