Math 1324 - Course Core Outcome Measuring Tool The number of iPods, , sold at an electronics store each week determine a revenue function, , and a cost function, . Both functions are defined on the interval , and their graphs are given below. a) Write a sentence that describes what the points of intersection indicate about the profit? b) Use interval or set notation to describe the number of iPods that must be sold to earn a profit. c) Use interval or set notation to describe the number of iPods that must be sold to earn a loss