Relay Marathon

I’m going to join a relay marathon competition this weekend. Each group runs 42km in total cooperating with their members. The number of member in each group is different, so the more the group has members, the less distance each person runs. There are five members in our group. Therefore, each one runs about 8km. One lap is about 2km, so we need to run the course four times each. We can take a rest after running a lap. I’ve joined a full marathon competition, so this relay marathon is not hard for me. Our members are my colleagues in our school. I hope we can complete the 42km marathon without any injuries.