Task: Question Answering
Input (English): Problem: maxwell leaves his home and walks toward brad ' s house at the same time that brad leaves his home and runs toward maxwell ' s house . if the distance between their homes is 36 kilometers , maxwell ' s walking speed is 3 km / h , and brad ' s running speed is 6 km / h . what is the distance traveled by maxwell when they meet in the middle ? 
Options: a ) 12 , b ) 14 , c ) 15 , d ) 13 , e ) 11
Output (English): a