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: two consultants can type up a report in 12.5 hours and edit it in 7.5 hours . if mary needs 30 hours to type the report and jim needs 12 hours to edit it alone , how many t hours will it take if jim types the report and mary edits it immediately after he is done ? 
Options: a ) 41.4 , b ) 34.1 , c ) 13.4 , d ) 12.4 , e ) 10.8
[A]: a


[Q]: Problem: the sum of three consecutive even numbers is 63 . find the middle number of the three ? 
Options: a ) 14 , b ) 23 , c ) 25 , d ) 29 , e ) 21
[A]: e


[Q]: Problem: a car traveled from san diego to san francisco at an average speed of 54 miles per hour . if the journey back took twice as long , what was the average speed of the trip ? 
Options: a ) 24 . , b ) 32 . , c ) 36 . , d ) 42 . , e ) 44 .
[A]:
c