Activity by hours: Depending on what needs to be done, If I were to be an editor I would most likely spend 2 hours a day, exceptions for weekends of course ranging from 2-4 Hours.
What position do you seek?: Editor
Evidence you can pull off the job: I can fix most grammar mistakes and do alright at English at school. You also made a mistake with this question "Evidence you can pull off the job" you forgot the : after job.
Why should you be chosen as News Team: Because I am pretty active on forums and like editing things.
What can you bring to News Team: This refers to the other questions, I am sure you can decide that.