(a) Within 5 days after a petition for guardianship of a child is filed with a court, the clerk shall send a copy of the petition and notice of filing to:
(1) each of the child’s living parents who has not waived the right to notice; and
(2) each living parent’s attorney of record.
(b) Notice under this section shall be by first-class mail.
(c) Notice to a parent under this section shall be sent to a parent’s last address known to the court.