Is Haneul deaf or mute? Cause either she'…

Is Haneul deaf or mute? Cause either she's very good at lip reading at such a young age, i doubt she understood byul in the grocery

She is deaf ^^ but in the grocery store she just assumed that the tteobbokki was missing because Byul always forget (she didn’t understand what byul said but she kind of translated the situation ^^)