[1] King Khalid Univ, Coll Sci, Dept Chem, POB 9004, Abha 61413, Saudi Arabia
[2] Mohi Ud Din Islamic Univ, Dept Math, Nerian Sharif 12080, AJ&K, Pakistan
[3] Namal Univ, Dept Math, Mianwali 42250, Pakistan
[4] Hazara Univ, Dept Math & Stat, Mansehra, Pakistan
[5] Higher Educ Dept, Muzaffarabad 13100, AJ&K, Pakistan
[6] Univ Hafr Al Batin, Dept Math, Hafar al Batin 31991, Saudi Arabia
[7] Kwara State Univ, Dept Math & Stat, Malete, Nigeria
[8] Laghman Univ, Dept Phys, Mehtarlam City 2701, Laghman, Afghanistan