What (a) total number of early childhood development (ECD) centres are registered in (i) Graaff-Reinet, (ii) Aberdeen, (iii) Nieu-Bethesda, (iv) Steytlerville, (v) Jansenville, (vi) Klipplaat and (vii) Willowmore and Rietbron in the Sarah Baartman District Municipality, (b) number of the specified ECD centres cater for people with disabilities and (c) number of learners are each of the ECDs registered for?