2739. What characters can be added here so that each character contains a part of the previous character? a) 翌 -> _ -> _ -> 眺 b) 案 -> _ -> _ -> 給

a) 翌 -> 音 -> 冒 -> 眺  

翌  YOKU - next, following

音  ON, IN, oto, ne - sound

冒  BOU , oka(su) - risk, brave, deft, dare, desecrate

眺  CHOU, naga(meru) - look at, watch, gaze

b) 案 -> 柱 -> 素 -> 給  

案  AN - plan, proposal

柱  CHUU, hashira - pillar, column, pole

素  SO, SU - element, naked, simple

給  KYUU - supply