1. Department of Mathematics, Lafayette College, Easton, Pennsylvania, USA
2. Department of Mathematics, Nevşehir Hacı Bektaş Veli University, Nevşehir, Turkey
3. Department of Mathematics and Statistics, Mutah University, Al-Karak, Jordan
4. Department of Mathematics, CHRIST (Deemed to be University), Bengaluru 560029, India
5. Department of Mathematics, Drexel University, Philadelphia, Pennsylvania, USA