I would be grateful for advice on whether I need to execute the commands step by step (in what sequence?) or if I combine all the commands. I have 6000 observations in total but only need to segregate those in specific ages (currently they are continuous) which are 50 and above. Out of these observations, I need to drop those who are retired and leave with only 3 other categories (work full time, work part time and unemployed). Then I need to further subdivide them into 4 age categories 50-54, 55-59, 60-64, 65+. How should I do it? Thank you so much.