Evangeline and Riley were making their way to class yesterday, starting from the main doors of the school. This door is 30 m from the main stairs. They began walking at a steady pace, arriving at the stairwell in 2 minutes. When they got there, Evangeline realized that she forgot her math book in the hallway when she stopped at the sanitizer, which is 10 m from the door. They quickly went back to pick it up, arriving in 30 seconds and taking an additional 30 seconds to get the book. They return to the stairwell at a steady speed, arriving in one minute. The run up the stairs takes 30 terrifying seconds. They continued running to get to class, covering 30 m in one minute. Create a distance time graph to show their journey.