he sales revenue for a footwear company over a four year period are as follows Year 1 2 3 4 Sales in Billions PN W AU Sales Billion Net Income 5 billions 2 21 Use this information to answer the following questions a Are these cross sectional or time series data 6 3 25 These are cross sectional data because the data were collected over time These are cross sectional data because the data were collected all at once These are time series data because the data were collected all at once These are time series data because the data were collected over time 3 66 b Construct a bar graph similar to the given figure 4 06 1 0 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Year Net Income for McDonald s Inc 2 Year 3 4 DO Sales nic 1 2 Year 3 4 Sales in Billions NW 44 2 Year 3 4 Sales in Billions L 1 2 Year 3 4