1. Department of Mathematics , Visva Bharati University , Santiniketan 731235, India
2. Department of Mathematics, Gushkara Mahavidyalaya , Purba Bardhaman , Santiniketan 713128, India
3. Information Technology College, Imam Ja’afar Al-Sadiq University , Baghdad , Iraq
4. Department of Mathematics , Sikkim Manipal Institute of Technology, Sikkim Manipal University , Majitar , Rangpo , East-Sikkim 737136, India
5. Almunawarrah Dynamic Enterprise , Kajang , Malaysia