1. Department of Mathematics, SRM Institute of Science & Technology, Kattankulathur, 603 203 Tamil Nadu, India
2. Industrial Mathematics Laboratory, Baikal School of BRICS, Irkutsk National Research Technical University, Irkutsk 664074, Russia
3. Department of Applied Mathematics and Programming, South Ural State University, Lenin Prospect 76, Chelyabinsk 454080, Russia
4. Department of Mathematics, Dmi St John the Baptist University, 800-Central Africa, Malawi