Final answer:
The sentence should be: Jin Lee designed a bright, blue jersey for the basketball team this year.
Step-by-step explanation:
The correct punctuation for the sentence is:
Jin Lee designed a bright, blue jersey for the basketball team this year.
The commas after 'bright' and 'blue' were removed because they were not necessary. Commas should be used to separate items in a list, but in this sentence, 'bright' and 'blue' are describing the same thing - the color of the jersey. Therefore, they do not need to be separated by commas.
Learn more about punctuation in English sentences