Consider the following Linear Programming Model and its associated spreadsheet model. Let A = the number of individual pizzas that can be made and B = the number of large pizzas that can be made. We make a profit of $3 for each individual pizza and a profit of $9 for each large pizza that we sell. We would like to maximize our profit function, 3A + 9B, subject to the constraints 1A + 4B 24 and 1A + 2B 16. Refer to the image of the spreadsheet below. Which cell(s) specifies the "Changing Variable Cells" in Excel Solver? B3:C3 D6:D8 B2:C2 B1:C1