Exercise 2 The five number summary for the number of hours spent exercising a week for the sample of 4800 students in a survey is (0, 5, 7, 20,40). 1. Approximately how many students exercised at most 7 hours in a week? 2. Approximately how many students exercised within 5 to 7 hours in a week? 3. Describe the skewness of the distribution. 4. Is it likely that on average. the surveyed students exercised 7 hours in a week? Explain. 5. Calculate the IQR. Approximately how many observations lie in this range