Task: Question Answering
Input (English): Problem: diana works 10 hours per day on monday , wednesday and friday , and 15 hours per day on tuesday and thursday . she does not work on saturday and sunday . she earns $ 1800 per week . how much does she earn in dollars per hour ? 
Options: a ) 20 , b ) 22 , c ) 30 , d ) 24 , e ) 25
Output (English): c