Task: Question Answering
Input (English): Problem: a , b and c are partners . a receives 2 / 3 of profits , b and c dividing the remainder equally . a ' s income is increased by rs . 400 when the rate to profit rises from 5 to 7 percent . find the capital of b ? 
Options: a ) 3999 , b ) 7799 , c ) 2500 , d ) 5000 , e ) 2912
Output (English): d