<prompt> Ngwala go tšwela pele ka serapa se - Halsall o ile a emela Great Britain dipapading tša Olimpiki tša Selemo tša 2008 ka lebelo la go fofa ka serurubele la 100 m, 50 m ya go fofa ka go fofa o lokologile  <response>: , 100 m freestyle, 4×100 m freestyle, 4×200 m freestyle le 4×100 m medley 