1. Department of Mathematics Education, University of Education, Winneba (Kumasi Campus), Kumasi, Ghana
2. Institute for Groundwater Studies, University of the Free State, Bloemfontein 9301, South Africa
3. Mathematics Department, College of Sciences and Humanities Studies Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
4. Department of Basic Science, Faculty of Computers and Informatics, Suez Canal University, Ismailia 41522, Egypt