Construct a frequency table using bins 0-59 s 60-119 s

Question

The times that 30 vehicles were stopped at a traffic light are listed below. 

1. 33,195,265,95,163,172,280,160,45,135,192,176,125,165,82,65,235,200,130,152,145,110,73,205,215,148,100,245,185,140.
2. Construct a frequency table using bins 0-59 s, 60-119 s, 120-179 s, 180-239 s, and 240-299 s. Plot the data and make a frequency polygon.
3. What kind of distribution is your graph? Explain your choice