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Answer:The five number summary isMin = 15Q1 = 22Median = 27Q3 = 41Max = 49The explanation for each is given below. Also, the boxplot is shown below as well. The boxplot has markers at 15,22,27,41,49.=======================================================Explanation:The five number summary talks about these five valuesMinQ1Median (aka Q2)Q3MaxThe min and max are exactly what you'd expect: They are the smallest and largest items. The Q1 and Q3 refer to the first and third quartile. The median is at the exact halfway point of the data set.--------------------The original data set is $26, $15, $28, $45, $49, $18, $26, $37Delete the dollar signs to get26, 15, 28, 45, 49, 18, 26, 37Then sort the data from smallest to largest15, 18, 26, 26, 28, 37, 45, 49There are n = 8 items in that set. Split it in half to get n/2 = 8/2 = 4The median value is between slot 4 and 5. The data values in those slots are 26 and 28. The midpoint of those values is 27. Therefore, the median is 27.Now we'll split the data into two groupsL = lower setL = set of items smaller than the medianL = {15, 18, 26, 26}U = upper setU = set of items larger than the medianU = {28, 37, 45, 49}The medians of set L and set U are 22 and 41 respectively. These represent the values of Q1 and Q3.Q1 = first quartile = 22Q3 = third quartile = 41The min and max are the easiest to spot after the data set is sorted of courseMin = 15Max = 49-------------------------------Here's the five number summaryMin = 15Q1 = 22Median = 27Q3 = 41Max = 49The box plot (aka box-and-whisker plot) will have its key features derived from this five number summary data set.The values 15,22,27,41,49 are found on the box plot shown below.median = 27 is the vertical line inside the boxQ1 = 22 and Q3 = 41 are the left and right edges of the boxMin = 15 and Max = 49 are the tips of the left and right whiskers. This is when we don't have any outliers.