In respect of the valuation roll of the Mangaung Metro which came into operation on 1 July 2013, (a) how many appeals have been lodged against valuations contained in this valuation roll, (b) on how many days did the appeals tribunal dealing with these appeals meet to handle appeal hearings, (c) how many of the appeal hearings have been finalised and (d) in how many of the appeals in which the hearings have been concluded have the appeals been upheld?