(a) Draw an outline map of Nigeria and on it show and name
(i) the Rivers Niger, Benue, Sokoto, Cross and Ogun
(ii) one natural lake and one artificial lake
(iii) the Jos Plateau, the Udi Hills, the Western Highlands and the Obudu plateau
(iv) one lowland region in the north and one in the south

(b) Describe the importance of the River Niger to the economy of Nigeria.