https://excellenttermpapers.com/wp-content/uploads/2020/07/logo-300x75.png00adminhttps://excellenttermpapers.com/wp-content/uploads/2020/07/logo-300x75.pngadmin2020-09-08 13:29:502020-09-08 13:29:50if the concept is truck, the prototype might be? if the prototype is block or ball, the concept is?