1. Department of Mathematics, Comsats University Islamabad, Pakistan; asadiqbal494@gmail.com
2. Department of Mathematics, University of the Punjab, Lahore 54590, Pakistan
3. University of Hafr Al Batin, Department of Mathematics, Hafr Al Batin, KSA; iealshamri@uhb.edu.sa
4. University of King Abdulaziz, Department of Mathematics, Jeddah 21589, KSA; cozel@kau.edu.sa