With reference to the note of the Auditor-General in his review of the 2017-18 Annual Performance Plan of her department, that her department is presently negotiating with unions on the implementation of performance agreements of principals, (a) why is there a delay in the implementation of the performance contracts, (b) which unions are currently opposed to the implementation of performance contracts and (c) what plans does she have to resolve the impasse over the implementation of performance contracts?