Twenty college students were asked how many texts they send on a typical day and the results are shown below. 

3, 4, 5, 10, 10, 10, 20, 20, 30, 30, 30, 50, 50, 55, 75, 75, 100, 150, 200, 250 

a. Find the five-number summary for this dataset. 

b. Would you say the dataset is fairly symmetric, skewed left, or skewed right? Explain.