(a) Draw an outline map of Nigeria. On the map show and name: (i) the railway line from Lagos to Minna; (ii) one area each of limestone; coal; columbite; go...

(a) Draw an outline map of Nigeria. On the map show and name:
(i) the railway line from Lagos to Minna;
(ii) one area each of limestone; coal; columbite; gold.
(b) Describe the method of mining columbite in Nigeria.

(c) Highlight three adverse effects of mining in one of the mining areas in (a)(ii) above.