Conceptually, the purpose of a dictionary is to represent a relationship between two collections of data - each key in the dictionary is related to one value. Which of the following situations are instances of such a relationship? Select all that apply (one or more). Do not include situations where you have to introduce additional information in order to fit them into such a relationship. Storing x and y coordinates of 2-dimensional points taken from a function, so that each coordinate occurs at most once. Computing averages Storing a collection of student ID numbers Storing a sensor's data samples Storing where each person lives