1. Department of Mathematics, COMSATS University Islamabad, Islamabad, Pakistan
2. Department of Mathematics and Statistics, College of Science, Taif University, Taif, Saudi Arabia
3. Department of Electrical and Computer Engineering, COMSATS University Islamabad (CUI), Wah, Pakistan
4. Department of Mathematics, COMSATS University Islamabad (CUI), Wah, Pakistan
5. Department of Basic Medical Sciences, College of Applied Medical Science, King Khalid University, Abha, Saudi Arabia