(1) Whether he has been informed that the copper matting installed at the Medupi Power Station was tarnished by mud deposits; if so, what is the extent of the damaged caused; if not, (2) whether he intends to investigate the matter; if not, what is the position in this regard; if so, what are the relevant details; (3) whether (a) the copper matting would need to be replaced and (b) additional costs for the replacement of the copper matting will be incurred; if not, how was this conclusion reached in each case; if so, (4) whether the cost of the replacement will be borne by the (a) contractors or (b) his department; (5) whether the incident caused further delay in the construction of this power station; if not, how was this conclusion reached; if so, what are the relevant details?