2. The data set rats.dat [11 contains the following variables, in order, on a set of eight rats: rat, rat number dob, date of birth disease, date of disease death, date of death group, treatment group Save the file to a convenient location on your computer, and then without editing the file in anyway read the data from the ascii file into a temporary SAS data set called rats. You will probably need to access SAS Help and Documentation to learn the appropriate informat to