The line chart above
I do not see any. Do not refer to an image location as you are required to use descriptive means for the content presentation in the summary overview. Assume no image is provided to the reader.
three various age classifications
Which are? The data presentation is incomplete.
yellow line and red line
Which color code refers to what? If mentioned in order, end by saying " respectively ". Be precise. Be clear.
This extra statement is not required. The image does not contain enough data to warrant a 4th presentation. This does not provide the required 3-5 sentences as a paragraph representation. If this was meant as a conclusion, please be advised that a Task 1 essay does not require it as this is a report rather than opinion essay.