Read this: There were aspirated stops at three places of articulation: labial, coronal, and velar /p t k/. Earlier Greek, represented by Mycenaean Greek, likely had a labialized velar aspirated stop /k/, which later became labial, coronal, or velar depending on dialect and phonetic environment.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): Earlier Greek was represented by what?
Mycenaean Greek