1. Department of Mathematics, Government College University Faisalabad Layyah Campus, Layyah 31200, Pakistan
2. Division of Science and Technology,University of Education, Township, Lahore 54590, Pakistan
3. Department of Mathematics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
4. Department of Physics, Zhejiang Normal University, Jinhua 321004, Peoples Republic of China