Each hour, for several hours, the owner or a bakery recorded the number of customers who entered the store. The box-and-whisker plot (sometimes called a boxplot) summarizes the data. 10 15 20 25 30 35 40 50 Number of customers Use the box-and-whisker plot to answer the following. (a) What is the median number of customers? (b) What is the smallest number of customers? (c) What is the first quartile (Q) of the numbers of customers?