1. Department of Mathematical Sciences, Delaware State University, Dover, DE 19901-2277, USA
2. Center for Research and Education in Optical Sciences & Applications, Delaware State University, Dover, DE 19901-2277, USA
3. Faculty of Electronic Engineering, Department of Telecommunications, University of Nis, Aleksandra Medvedeva 14, 18000 Nis, Serbia
4. Department of Physics, Indian Institute of Technology, Guwahati, Guwahati-781039, India
5. Department of Mathematical Sciences, Applied Mathematics Research Center, Delaware State University, Dover, DE 19901-2277, USA