Alex was invited to a formal dinner by his manager. As he had never been a part of a formal six-course meal, he was not sure about the use of the different cutleries for each course. He watched the other diners seated beside him and followed their use of knives and forks. He learned that the really small fork was for the shrimp cocktail, and that the bread plate on the left as well as the glass of water on the right were for him. This kind of learning is an example of _____shapingmodelingrenquingdiffusingreinforcing