(a) The method of appointment of arbitrators is as specified in the agreement to arbitrate.
(b) The court, on application of a party stating the nature of the issues to be arbitrated and the qualifications of the proposed arbitrators, shall appoint one or more qualified arbitrators if:
(1) the agreement to arbitrate does not specify a method of appointment;
(2) the agreed method fails or cannot be followed; or
(3) an appointed arbitrator fails or is unable to act and a successor has not been appointed.
(c) An arbitrator appointed under Subsection (b) has the powers of an arbitrator named in the agreement to arbitrate.