Question 1: Short answer
mediumAI-checkedTokenizationA byte-level BPE tokenizer starts from the 256 byte values (ASCII: 116 = t, 104 = h,
101 = e, 32 = space) and learned, among others, these merges:
(101, 32)→ token 256(116, 104)→ token 259(259, 256)→ token 275
How many bytes of text does token 275 stand for?