QUESTION TWO [20] 2.1 The following less than ogive graph shows the duration of a sample of international phone calls using a prepaid calling card. Examine the graph and answer the questions that follow: Duration of International Calls E (U Q u. D I a) .D E 3 Z .1 00 Duration (minutes) 2.1.1 What is the sample size? (3) 2.1.2 How many intervals are used in the construction of the ogive? (3) 2.1.3. What is the most frequently occurring time of calls? (3) 2.1.4. Half of the calls are shorter than how many minutes? (3) 2.1.5. What is the percentage of the calls that are longer than 24 minutes? (4) 2.1.6. Approximate the number of the calls are 10 minutes or less? (4)