There needs to be more information in order to solve your problem.
I'm sorry :(
divide total miles by time:
157.5 / 2.5 = 63 miles per hour
13.95+2.25+2.25+2.25+2.75+2.75+2.75= 28.95
The answer I got was 59.2
How I got it was that I counted how many years it was I got 16 years multiplied it by 3.7 and got 59.2
