1. Juan asked 21 of his friends how much they weigh, then made this stem-and-Ieafplot. Key: 16 l 2 = 162 pounds a) What is the mode of this data? Explain how you know. b) What is the median of this data? Explain how you know. c) Without doing any calculations, Juan knows that the mean will be larger than the median. How can he know that? d) In this data, the first quartile (11 = 182 and the third quartile Q3 = 207. Juan's friend who weighs 231 pounds says he is an outlier. Is this true? Use calculations involving the given quartiles and the IQR to prove your