Peterlinz- find out if lang is regular or not

Question

L= { uww^Rv : u,v,w are from {a,b}⁺ } is L regular ?

L' = { ww^Rv : u,v,w are from {a,b}⁺ }  is L' regular ?

Comments

Both are cfls

Answer 1

L in regular, regex is = $(a+b)^+(aa+bb)(a+b)^+$ , put the minimal strings on w and and try to extend u and v individually.

But, by the same logic $L'$ is not regular because we have only free option on v.

Comments

Is the correct answer D then ??