Answer:
a) 畑 -> 男 -> 加 -> 嘱
畑 hatake - cultivated field
男 DAN, NAN, otoko - male, man
加 KA, kuwa(eru), kuwa(waru) - add, append, join, take part
嘱 SHOKU - request, entrust, commission
b) 妄 -> 如 -> 吐 -> 地
妄 MOU, BOU - without reason, without authority
如 JO, NYO - equal, like, as, as if
吐 TOU, ha(ku) - spew, vomit, give vent to
地 CHI, JI - earth, land