Answer:
a) 岳 -> 岩 -> 破 -> 頗
岳 GAKU, take - mountain peak
岩 GAN, iwa - rock
破 HA, yabu(ru), yabu(reru) - break, broken, tear, torn
頗 HA, suko(buru)
b) 妄 -> 如 -> 員 -> 贈
妄 MOU, BOU - without reason, without authority
如 JO, NYO - equal, like, as, as if
員 IN - member
贈 ZOU, SOU, oku(ru) - give, present, bestow