Question 3 - Refer to the relevant Excel sheet. a) Calculate the NPV for both projects using the =NPV() formula. b) Create a plot of the NPV curves. c) Identify the switching point of the projects. Project, Year 0 1 2 3 Project A -100 50 40 30 Project B -100 30 45 50 Discount Rate 10% NPV of A = NPV of B =