W2 assignment1 submitting problem help

when i try to submit the assignment it gave me 0 as a grade and give me this error message
There was a problem compiling the code from your notebook. Details:
can’t assign to keyword (, line 54)
i am sure that i followed the instruction very well .

Please post a screen capture image that shows the entire grader feedback where that line of text was displayed. I’d like to know which part of the assignment generated that error.