What amount did (a) her department and (b) each entity reporting to her spend on advertising on the (I) Africa News Network 7 channel, (ii) SA Broadcasting Corporation (aa) television channels and (bb) radio stations, (iii) national commercial radio stations and (iv) community (aa) television and (bb) radio stations (aaa) in the 2015c16 financial year and (bbb) since 1 April 2016? NW2408E