Ex.2

 https://drive.google.com/file/d/1bpbYCP5VN4YwJuFw7cJit5BkklZWXTcL/view?usp=sharing

http://www.efos.unios.hr/poslovne-simulacije/wp-content/uploads/sites/180/2013/09/Arena_Basic_Edition_User_s_Guide11.pdf