(a) What are the details of the tenders that were awarded for projects in all wards of Vaalwater in the Modimolle Local Municipality in Limpopo in the (i) 2011-12, (ii) 2012-13, (iii) 2013-14 and (iv) 2014-15 financial years, (b) what are the exact amounts in each case and (c) what are the names of the contractors to whom the specified tenders were awarded in each case?