You have to post your discussion on the blackboard, ATTACHEMENT WILL NOT BE ACCEPTED.
Since this discussion worth 3 points, you should put more effort on it.
You could reply to as many posts as you would like (there is no limit as long as the discussion still within the deadline) because your grade will depend on both: your post and replies. THE MINIMUM REPLIES ARE 5.
Your five replies have to add to the discussion rather than evaluating the discussion; so replies such as “I agree with you”, “great post”, “great point” ……. Etc. WILL NOT BE ACCEPTED.
Relate your answer to the attached excel file that consists of 9 GDP