Task: Question Answering
Input (English): Problem: in 7 given numbers , the average of first 4 numbers is 4 and that of last 4 numbers is also 4 . if the average of these 7 numbers is 3 , the fourth number is ? 
Options: a ) 3 , b ) 4 , c ) 7 , d ) 11 , e ) 12
Output (English): d