Perita, when you discuss your opening statement, after you present your opinion, do not add information to it that will make it seem like you are already discussing the facts of the essay. The opening statement must only serve as a reference point for your ability to restate an English discussion and outline a discussion process. This is used to consider whether or not you have the English analytical ability for university studies. The actual discussion should only be presented in the body paragraphs.
In the second paragraph, you have an incomplete sentence at the point where you said
It is always good to have opponent firms for us.
Are you a business owner? Why do you address yourself in the incomplete sentence? The sentence is not clear in meaning. You need to clarify what you mean by offering a reason to support it.
When you present the percentage discussion, please present it in the global format which is: number then percentage symbol. It throws the reader off when you present it in reverse.
In your closing remarks, you must never add new information, such as the final sentence that indicates how the negative sides need to be noted and action must be taken upon it. That is presenting a new venue for discussion, which is is not allowed in a closing paragraph as the paragraph is meant to simply end the discussion. The way to end it is by summarizing the earlier discussion and then repeating your opinion at the end. There is no need for additional information at that point. Otherwise, you will need a new paragraph to discuss that information. In which case, you will go over the maximum 5 paragraph requirement.