Algebra-1

A city's transportation department surveyed commuters about their primary mode of transportation (Car, Bus, Train, Bike) and the distance they commute (Short - less than 5 miles, Medium - 5 to 15 miles, Long - more than 15 miles). The data is summarized in the following two-way frequency table:

If a commuter is randomly selected, what is the probability that the commuter takes the train given that they have a medium commute distance? (Express as a fraction in simplest form)