1. School of Mathematics and Computer Sciences, Chifeng University, Chifeng 024000, China
2. Department of Mathematics and Statistics, Hazara University Mansehra, Mansehra 21120, Pakistan
3. Department of Mathematics, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
4. Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al Ahsa 31982, Saudi Arabia