A passage is thought to be easily understandable by 13-to 15-year-old students if the Flesch score, rounded to one decimal place, is 60 or higher. For the passages considered in part (b), how many words should be in the passage to make it easily understood by 13- to 15-year-old students? Suggestion: First use a table increment of 20 to get an estimate of the answer. Then change to a table increment of 1.