A. M. Siddiqui1, M. KamranAlam2*, S. Islam3, M. T. Rahim2 and Manzoor Elahi3
1Department of Mathematics Pennsylvania State University, York Campus, 1031 Edgecombe Avenue, New York, PA 17403, USA.
2Department of Mathematics, National University of Computer and Emerging Sciences, Peshawar, Pakistan.
3COMSATS Institute of Information Technology, Islamabad 44000, Pakistan.
Email: [email protected]