Whether her department has conducted an audit of infrastructure and equipment at the SA Broadcasting Corporation; if not, why not; if so, (a) how much infrastructure and equipment needs to be replaced, (b) how much funding has been devoted to replacing outdated infrastructure and equipment and (c) how much has been spent on maintenance of existing infrastructure and equipment (i) in the (aa) 2012-13, (bb) 2013-14, (cc) 2014-15 and (dd) 2015-16 financial years and (ii) since 1 April 2016?