1. Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, Azad Jammu and Kashmir, Pakistan
2. Department of Mathematics and Statistics, Hazara University, Mansehra, Khyber Pakhtunkhwa, Pakistan
3. Department of Mathematics, Faculty of Sciences, HITEC University Taxila, Punjab, Pakistan
4. Sardar Bahadur Khan Women’s University, Quetta, Balochistan, Pakistan