1. Institute of Mathematics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Punjab, Pakistan
2. Department of Mathematics, The Islamia University of Bahawalpur, Rahim Yar Khan Campus, Punjab 64200, Pakistan
3. Department of Mathematics, University of Ghana, P. O. Box LG 62 Legon, Accra, Ghana
4. Plant Production Department (Horticulture-pomology), Faculty of Agriculture, Saba Basha Alexandria University, Alexandria, Egypt