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The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.Time (in minutes) Relative Frequency0 but less than 5 0.37 5 but less than 10 0.2210 but less than 15 0.1515 but less than 20 0.1020 but less than 25 0.0725 but less than 30 0.0730 or more 0.02 If 1,000 calls were randomly sampled, how many calls laasted under 10 minutes?