With reference to her letter of 27 August 2016, addressed to Mr K P Robertson, (a) which (i) waste water treatment plants and (ii) sewerage pipelines are due to be (aa) upgraded and/or (bb) refurbished in the Chief Albert Luthuli Local Municipality in Mpumalanga, (b) by when are the specified improvements due to begin and (c) what portion of the R25 million allocated by her department through the Municipal Infrastructure Grant will be used in each case?