Answer: Each person should play a big part to make a 100. The answer to the main question is timing.
Explanation: Have the best drawer in the group be student A and have someone in the group go around the school and label the area. Or you could even use a map of the school's area. Have student B label the layout of the school and analyze the plan. Have a discussion and brainstorm on anything new you can think of adding to this plan. Student B should add those ideas into the plans if needed, and then once you are finished you should present it to the class.