Table 2. Population, area, and population density in each of the cities included in this work as per Worldometer census data.

City	Population (2020)	Area (km2)	Population density (person/km2)
Lagos	9,000,000	1,171	7,685
Kano	3,626,068	449	8,076
Ibadan	3,565,108	3,080	1,158
Abuja	590,000	1,769	334
Owerri	215,038	551	390
Onitsha	561,066	52	10,789