For the leader, the job is to manage the group and make sure everyone has their fair share of assignments, for the blog manager, he has to update the blog often with new information,for the schedule manager, the person has to plan when the assignments are to be completed or when the group has to meet. For the public relations manager, he manages relations with the public. I do not know why
I think the roles and responsibility of a leader is to manage te group well and let the group behave. The blog manager is to post question and to censor whatever is not relevant to IRS. The schedule manager is to make sure the group does not let the group overshot the time limit. A for the public relations manager, he ensures that the group does not have quarrels with the public or other group.
A leader would be the one who leads and motivates the team to do their tasks well. He also manages the flow of work. A Blog Manager manages the blog and its posting. He must make sure that the blog is pleasing to the eyes and has no irrelevant posts. A Schedule Manager manages the schedule in which we plan our tasks. Finally, a Public Relations Manager helps us to communicate with other members. We would want to establish good relations with other members and so we may be able to collaborate in the future.