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: a can finish a work in 20 days , b in 15 days and c in 12 days . b and c start the work but are forced to leave after 2 days . the remaining work was done by a in :
Options: a ) 10 , b ) 11 , c ) 12 , d ) 13 , e ) 14
[A]: e

[Q]: Problem: it costs $ 6 for the first 1 / 4 hour to use the copier at kinkos . after the first hour it costs $ 8 per hour . if a certain customer uses the copier for 4 hours and 25 minutes , how much will it cost him ?
Options: a ) $ 23.45 , b ) $ 65.33 , c ) $ 40 , d ) $ 38.27 , e ) $ 39.33
[A]: e

[Q]: Problem: if 40 sheep eat 40 bags of grass in 40 days . in how many days one sheep will eat one bag of grass ?
Options: a ) 1 , b ) 20 , c ) 40 , d ) 80 , e ) 70
[A]:
c