Task: Question Answering
Input (English): Problem: on a trip , a cyclist averaged 11 miles per hour for the first 22 miles and 10 miles per hour for the remaining 20 miles . if the cyclist returned immediately via the same route and took a total of 9 hours for the round trip , what was the average speed ( in miles per hour ) for the return trip ? 
Options: a ) 7.6 , b ) 7.8 , c ) 8 , d ) 8.2 , e ) 8.4
Output (English): e