With reference to her reply to question 1579 on 18 May 2015, (a) how many RDP houses have been structurally rectified by the National Home Builders Registration Council as a result of poor workmanship in (i) Gauteng, (ii) Limpopo, (iii) North West, (iv) Eastern Cape, (v) Western Cape and (vi) Northern Cape and (b) what is the total cost of these rectifications in each specified province as at the latest specified date for which information is available?