 <translate> Answer the following question, but give the rationale first. Has categories of Nobel prizes remained same since Alfred Nobel established them? <yor> Dáhùn ìbéèrè tó tẹ̀ lé e yìí, kó o sì sọ ìdí tó o fi sọ bẹ́ẹ̀. Ǹjẹ́ àwọn ẹ̀ka ẹ̀bùn Nobel kò yí padà látìgbà tí Alfred Nobel ti dá wọn sílẹ̀? 