Finally!!! I did it !
I am so happy.. My assignment file has been accepted after three time amendments
First submission rejected due to " simplistic " , second submission rejected with the same problems. finally, i did it for the third submission.
After first submission failed, I try to upload the image for regular submission and it was approved.
My first submission :
And here is the accepted assignment file:
Photo credits: Woo Bing Siew.