Within 5 days after a petition for guardianship of a child is filed with a juvenile court, the clerk shall send a copy of the petition, with the notice of filing that was attached to the petition, to: the local department; each of the child’s living parents who has not waived the right to notice; each living parent’s last attorney of record in the CINA case; and the child’s last attorney of record in the CINA case. Notice under this section shall be by first-class mail. Notice under this section shall be sent to a parent’s last address known to the juvenile court.