In my opinion, all of the members have to try to fulfill each others job as we are all learning and we must not only learn about one thing/role.
The leader should guide the group members to achieve the end result.The blog manager should be in charge of the blog postings and should ensure that other members post/comment on the blog in time.The schedule manager has to make sure that everyone is completing their tasks on time and should hold group meetings for discussion if needed.The public relations manager has to share information with others and be able to contact those who can share information with us.However, all the people in the group should help one another regardless of their roles.
Everyone should participate in everything regardless of their role. More importantly, we ought to help each other with their jobs . However, the people in the different role shall oversee the process it. For example, the leader shall basically, make sure everything is done well , the blog manager should post relevant stuff on the blog but others can help to remind him or post on his behalf and the schedule manger shall make sure everyone does their work on time with others helping by reminding everyone about the deadline. The public relations manager shall organise how things are presented .
The leader should lead the group properly and too success.The blog manager should take good care of the blog and update it every now and then.Schedule Manager should make good schedules so that we can finish everything on time. The Public Relationship Manager should make good relationships with other groups.