A county is tracking infections over time in order to watch for potential outbreaks. The data is included in countyhealth.csv and countypop.csv. For these data: a - Create a line chart showing infections over time that includes all cities: b - Create a line chart that shows each city's infections over time as a percentage of the city's population. c - Create a stacked bar chart showing the total number of infections in each month. countypop csv countyhealth csv