In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: to produce an annual income of rs . 800 from a 8 % stock at 90 , what is the amount of stock needed ? 
Options: a ) 10000 , b ) 11000 , c ) 12000 , d ) 13000 , e ) 14000
[EX A]: a

[EX Q]: Problem: today joelle opened an interest - bearing savings account and deposited $ 7,000 . if the annual interest rate is 5 percent compounded interest , and she neither deposits nor withdraws money for exactly 2 years , how much money will she have in the account ? 
Options: a ) $ 7727.50 , b ) $ 7717.50 , c ) $ 7737.50 , d ) $ 7747.50 , e ) $ 7757.50
[EX A]: b

[EX Q]: Problem: an escalator moves towards the top level at the rate of 15 ft . sec and its length is 200 feet . if a person walks on the moving escalator at the rate of 5 feet per second towards the top level , how much time does he take to cover the entire length . 
Options: a ) 5 sec , b ) 10 sec , c ) 20 sec , d ) 15 sec , e ) 25 sec
[EX A]:
b