To examine the age when someone first tried smokeless tobacco, use the National Survey on Drug Use and Health, 2015, data set to complete the following exercises. a.Generate a table of the age when someone first tried smokeless tobacco (smklsstry). b.Generate a new variable that is identical to smklsstry and call it smklssage. c.Recode smklssage so that the codes 994, 997, and 998 are blank. d.Recode smklssage so that you combine users into the following categories: never used smokeless tobacco, <10, 10 to 12, 13 to 15, 16 to 18, 19 to 21, and >21. e.Generate value labels for these age-groups and apply them to smklssage. f.Generate a table of smklssage and notice the label that is in the left column of the table at the top. g.Create a variable label "Age when first tried smokeless tobacco" and apply this to smklssage. g.Generate a table of smklssage again and notice the change in the label above the left-hand column.