Department of Computer Science and Engineering, United International University, Dhaka, Bangladesh.|Department of Computer Science and Engineering, United International University, Dhaka, Bangladesh.|Department of Computer Science and Engineering, United International University, Dhaka, Bangladesh.|Department of Computer Science and Engineering, United International University, Dhaka, Bangladesh.|School of Engineering and Physics, University of the South Pacific, Private Mail Bag, Laucala Campus, Suva, Fiji.|Department of Computer Science, Morgan State University, Baltimore, MD, USA.