 Complete the following phrase:  Mumbwa is a town in the Central Province of Zambia, lying on the Great West Road. Its district covers the western part of the Central Province bordering Kaoma and Western Province to the west, Namwala and Southern Province to the south, Lusaka and Lusaka Province to the east, Kasempa and North-Western Province to the north and Kabwe to the north-east. It is known for its cotton and has a ginnery. The Zambia Air Force has a base in the district. Kafue National Park borders the district to the west. The predomit tribes are the Ila, who speak a dialect known as Sala, mostly to the south and south east and the Kaonde to the north. The Lenje are to the north-east on the border area with Kabwe. There are also relatively large settlement of people from the west and north west such as the Lozi, Nkoya and Luvale, Shona people from the then Southern Rhodesia who settled there as refugees from the 