1. Department of Mathematics and Statistics, International Islamic University, Islamabad, Pakistan
2. Department of Mathematics and Statistics, PMAS-Arid Agriculture University, Rawalpindi, Pakistan
3. Department of Mathematics, College of Science, Mustansiriyah University, Baghdad, Iraq
4. Department of Mathematics, King Khalid University, Abha, Saudi Arabia
5. Statistical Research and Studies Support Unit, King Khalid University, Abha, Saudi Arabia