Visitors to Yellowstone National Park consider an eruption of the Old Faithful geyser to be a major attraction that should not be missed. The given frequency table summarizes a sample of times (in minutes) between eruptions. Construct a histogram corresponding to the given frequency table. If you're scheduling a bus tour of Yellowstone, what is the minimum time you should allocate to Old Faithful if you want to be reasonably sure that your tourists will see an eruption?

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Time 40.49 Frequency 50-59 60-69 70-79 80-89 90-99 100-109 23 107