Task: Question Answering
Input (English): Problem: a certain sum amount to $ 1400 in 2 yrs and $ 2000 in 5 years on certain fixed simple interest . in how many yrs would the amount be $ 1640 had it been put at the rate of interest compounded annually ? 
Options: a ) 4.5 , b ) 3.5 , c ) 3 , d ) 2 , e ) 1.5
Output (English): e