1. Department of Mathematics, Deshbandhu College, University of Delhi, New Delhi 110019, India
2. Department of Mechanical Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia
3. Department of Mathematics, Bhagini Nivedita College, University of Delhi, New Delhi 110043, India
4. Department of Mathematics, College of Science, Qassim University, Buraydah 51452, Saudi Arabia