Jane, Peter, and Susan live together in a shared apartment. They each have their own food cupboard: Jane's is pink, Peter's is blue, and Susan's is green. One day, Jane buys a jar of peanut butter and places it in her pink cupboard before leaving for work. While she's away, Peter takes the peanut butter from Jane's cupboard and puts it in his blue one. Later, Susan moves the peanut butter from Peter's cupboard to her green one. When Jane returns home, she wants to make a sandwich with her peanut butter. Where will each roommate think the peanut butter is located? Provide a very brief response.
Jane will think the peanut butter is in her pink cupboard because that is where she left it before going to work. She has not been told or observed otherwise to think the peanut butter has been moved.

Peter knows that he took the peanut butter from Jane's pink cupboard and placed it in his blue cupboard, so he would assume the peanut butter is still in his blue cupboard unless he noticed Susan moving it or was informed of its new location.

Susan, having moved the peanut butter from Peter's blue cupboard to her green cupboard, knows that the peanut butter is now in her green cupboard.

Thus, Jane believes the peanut butter is in the pink cupboard, Peter thinks it is in the blue cupboard, and Susan knows it is in the green cupboard.