1. Financial Mathematics and Actuarial Science (FMAS)—Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
2. Department of Mathematics and Computer Science, University of Oradea, 1 University Street, 410087 Oradea, Romania
3. Department of Mathematics and Computer Science, Transilvania University of Brasov, 29 Eroilor Boulevard, 500036 Brasov, Romania