Task: Question Answering
Input (English): Problem: a can complete the job in 5 hours and b can complete the same job in 3 hours. a works for 1 hour and then b joins and both complete the job. what fraction of the job did b complete
Options: a. 1 / 8, b. 3 / 10, c. 1 / 2, d. 5 / 6, e. 8 / 9
Output (English): a