1. Dhanalakshmi Srinivasan University,School of Engineering and Technology,Department of Mathematics,Samayapuram,India,621112
2. Margaret Lawrence University,Department of Mathematics and Statistics,Galilee,Delta State,Nigeria
3. Federal University of Allied Health Sciences,Department of Applied Sciences,Enugu,Nigeria,400001
4. St. Joseph’s College of Enginering,Department of Mathematics,Chennai,Tamil Nadu,India,119