What (a) prompted the SA Broadcasting Corporation (SABC) to move Ikwekwezi FM from Johannesburg to Tshwane a few years ago, (b) are the running costs associated with running Ikwekwezi FM, (c) is the projected savings for the SABC to move Ikwekwezi FM back to Auckland Park and (d) is the total number of other SABC radio stations that are affected by the move.