Task: Question Answering
Input (English): Problem: because he ’ s taxed by his home planet , mork pays a tax rate of 45 % on his income , while mindy pays a rate of only 15 % on hers . if mindy earned 4 times as much as mork did , what was their combined tax rate ? 
Options: a ) 19 % , b ) 21 % , c ) 23 % , d ) 25 % , e ) 27 %
Output (English): b