Question: The Dow Jones Travel Index reported what business travelers pay for hotel rooms per night in major US. cities. The average hotel room rates for 20 cities are recorded. 163177166126123120144173160192 125167 245146139134167162145 207 A) Calculate the standard deviation in RStudio. Provide a screenshot of your R codes 81 R output. B) Which measure of the spread (interquartile range and standard deviation) is better to use here? Briefly justify your answer. Hint: You may need to provide a graph to support your answer. Make sure you attach both R codes & R output. 0 mark if no justification. C) Draw a stem plot for this variable