0810 - Feedback of 1_Simulation of CN Demand Planning and 1b_Planning Calendar training exercise

I understand the content and demonstration of "1_Simulation of CN Demand Planning and 1b_Planning Calendar" (1star = not at all, 5stars = very well)

Which part do you have difficulty to understand? Please describe

I can do the exercise of "Simulation of CN Demand Planning" (1star = cannot do, 3stars = can do it but need some help, 5stars = can do it totally independently)