1. Department of Mathematics and Statistics, Hazara University, Mansehra, Pakistan
2. Department of Mathematics, University of Sargodha, P. O. Box, 40100, Sargodha, Pakistan
3. Department of Mathematical Sciences, Faculty of Sciences, Princess Nourah bint Abdulrahman University, P. O. Box, 84428, Riyadh 11671, Saudi Arabia
4. Department of Mathematics and Sciences, Prince Sultan University, P. O. Box, 66833, Riyadh 11586, Saudi Arabia
5. Department of Medical Research, China Medical University, Taichung 40402, Taiwan
6. Department of Mathematics, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea