[1] Univ Gujrat, Dept Math, Gujrat 50700, Pakistan
[2] Umm Al Qura Univ, Fac Appl Sci, Dept Math, Mecca, Saudi Arabia
[3] Prince Sultan Univ, Dept Math & Sci, Riyadh, Saudi Arabia
[4] China Med Univ, Dept Med Res, Taichung 40402, Taiwan
[5] Asia Univ, Dept Comp Sci & Informat Engn, Taichung, Taiwan