For the data frame possum (DAAG package) (a) Use the function str() to get information on each of the columns. (b) Using the function complete.cases(), determine the rows in which one or more values...

For the data frame possum (DAAG package)

(a) Use the function str() to get information on each of the columns.

(b) Using the function complete.cases(), determine the rows in which one or more values is missing. Print those rows. In which columns do the missing values appear?