[1] Inst Space Technol 2750, Dept Appl Math & Stat, Islamabad 44000, Pakistan
[2] Fatima Jinnah Women Univ, Dept Math Sci, Rawalpindi 46000, Pakistan
[3] Prince Sultan Univ, Dept Math & Gen Sci, Riyadh, Saudi Arabia
[4] China Med Univ, Dept Med Res, Taichung, Taiwan
[5] Asia Univ, Dept Comp Sci & Informat Engn, Taichung, Taiwan