In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[Q]: Problem: the sum of 4 consecutive even numbers is 140 . what would be the smallest number ? 
Options: a ) 32 , b ) 88 , c ) 70 , d ) 123 , e ) 12
[A]: a


[Q]: Problem: a man ' s regular pay is $ 3 per hour up to 40 hours . overtime is twice the payment for regular time . if he was paid $ 180 , how many hours overtime did he work ? 
Options: a ) 8 , b ) 5 , c ) 9 , d ) 6 , e ) 10
[A]: e


[Q]: Problem: the radius of a semi circle is 2.1 cm then its perimeter is ? 
Options: a ) 32.5 , b ) 11.12 , c ) 32.1 , d ) 10.8 , e ) 32.3
[A]:
d