1. Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, Azad Jammu and Kashmir 12010, Pakistan
2. School of Mathematics and Physics, Guangxi Minzu University, Nanning 530006, P. R. China
3. NUTECH School of Applied Sciences and Humanities, National University of Technology, Islamabad 44000, Pakistan
4. Department of Mechanical Engineering, Lebanese American University, Beirut, Lebanon