(1) Who were the contractors responsible for the building of the original RDP houses which needed extensive rectification in the (a) Northern Cape, (b) Free State and (c) Eastern Cape; (2) are any of the specified contractors currently contracted by the Government; if not, what is the position in this regard; if so, what are the relevant details; (3) (a) what was the original cost of building such RDP houses in each case, (b) when were these houses originally built and (c) why was the cost of rectifying these houses so high; (4) whether there were any systems in place to monitor the quality of the houses being built; if not, why not; if so, (a) what are the relevant details in each case and (b) why was there a need for such extensive rectification?