How do I create a variable "AGE" when using an external SAS data set via infile statement? The data set already has DOB in it. This is how far I've gotten...     libname HW3 'c:\users\christopher\desktop\HW3'; data HW3.HW3_F18;   label       ID = "Subjects ID"                   RACE = "Subjects Race"                   DOB = "Subjects Date of Birth"                   FEV = "Subjects Fev"                   HEIGHT = "Subjects Height"                   GENDER = "Subjects Gender"                   WEIGHT = "Subjects Weight"                   DURATION = "Subjects Duration"                   WBCCOUNT = "Subjects WBCCount"                   MARITAL = "Subjects Marital Status"                   EDUCATION = "Subjects Education";   infile 'c:\users\christopher\desktop\HW3\hw3_f18.dat'; input ID Race $ DOB mmddyy10. FEV Height Gender $ Weight Duration WBCCOUNT Marital $ Education $20.; run; proc print data= HW3.HW3_F18; run; ... View more