1.  At 4:08 minutes, type captaincy on the console and check what you
get. 
2.  Find out how to calculate median - using help button.
3.  Do the above by web search.
4.  Calculate mean and median of the data frame CO2.
5.  Take the help of R for all the commands shown in this tutorial.
6.  Import a data set from the Internet directly or through a file