1. Institute of Mathematics, Khwaja Fareed University of Engineering & Information Technology, Rahim Yar Khan, Punjab 64200, Pakistan
2. Department of Mathematics, Uludag University, Gorukle 16059, Bursa, Turkey
3. Department of Mathematics and Statistics, Institute of Southern Punjab, Multan, Pakistan
4. Department of Mathematics, Jahangirnagar University, Savar, Dhaka, Bangladesh