Task: Question Answering
Input (English): Problem: the first year , two cows produced 8100 litres of milk . the second year their production increased by 15 % and 10 % respectively , and the total amount of milk increased to 9100 litres a year . how many litres were milked from each cow each year ? 
Options: a ) 3472 , b ) 8222 , c ) 4370 , d ) 26777 , e ) 8222
Output (English): c