(1) Whether her department has estimated the amount of energy that will be required in (a) five, (b) 10 and (c) 20 years’ time; if so, what (i) is the amount for each time period and (ii) is expected to be the installed capacity in each of these time periods; (2) whether the building of the (a) Kusile and (b) Medupi power stations will cater adequately for the energy needs of the next 20 years; if not, why not; if so, what are the relevant details in each case; (3) whether her department has compared the estimated cost of energy generation from the new coal power plants and other renewable sources; if not, why not; if so, (a) what comparative costs and (b) on what methodology are these costs based?