Task: Question Answering
Input (English): Problem: liam is pulled over for speeding just as he is arriving at work . he explains to the police officer that he could not afford to be late today , and has arrived at work only four minutes before he is to start . the officer explains that if liam had driven 5 mph slower for his whole commute , he would have arrived at work exactly on time . if liam ' s commute is 20 miles long , how fast was he actually driving ? ( assume that liam drove at a constant speed for the duration of his commute . ) 
Options: a ) 50 mph , b ) 45 mph , c ) 48 mph , d ) 52 mph , e ) 40 mph
Output (English): e