Hi$!$ I am struggling with SAS and needed help understanding what codes I would use for the following questions $($I have not provided the data sets but instead just need help with working through these$/$what I would do$)$: $1.$ Create a temporary dataset called $$Combined$$ that merges $$bc$\_$physicalactivity$,$bc$\_$reproductive$,$ and $$bc$\_$bmxlabs$$ by the unique identifier $($SEQN$).$ In the process$$of merging, create $3$ temporary datasets to hold the sorted data as part of the PROC$$SORT statement. Use these temporary datasets in your merge to create $$Combined$.$In the dataset $$Combined$,$ you only want to keep observations with data in the two$$datasets called bc$\_$bmxlabs and bc$\_$reproductive. $($HINT: you need to use the in$=$option$).2.$ Check the contents of the new SAS data set, $$Combined$,$ by running the appropriate$$procedure$.$ How many variables and observations are in the data set?$3.$ You would like to use shorter and more concise names for some of the variables in$$Combined$.$ You decide to rename a few variables so that they are easier to write in$$your subsequent codes. You rename these variables as follows: participant id as ID$,$race$/$ethnicity as RACE, education as EDU, ever been pregnant as PREG, ever taken$$birth control as OC$,$ and mean duration $($minutes$)$ of moderate activity bouts per day$$as MODACT. Consult the codebook at the end of this exercise to look up the names of$$these variables $($e$.$g$.,$ the variable name for participant id is SEQN$).$a$.$ Write a procedure to check if your variables have been successfully renamed.$$Describe how you verify the correct coding using the information on the results$$window$.3$