Task: Question Answering
Input (English): Problem: the ratio of investments of two partners p and q is 7 : 5 and the ratio of their profits is 7 : 9 . if p invested the money for 5 months , find for how much time did q invest the money ? 
Options: a ) 9 , b ) 17 , c ) 13 , d ) 10 , e ) 12
Output (English): a