1) Notice the SET statement concatenates the SASHELP . CLASS and PG2. CLASS_NEW2 tables. Highlight the DATA step and run the selected code. What differences do you observe between the first 19 rows and the last 3 rows? 2) Use the RENAME= data set option to change Student to Name in the PG2. CLASS_NEW2 table. Highlight the DATA step and run the selected code. What warning is issued in the log? 3) Highlight the two PROC CONTENTS steps and run the selected code. What is the length of Name in SASHELP . CLASS and Student in PG2. CLASS_NEW2? 4) According to your answer in 3), why do you think the warning message occurred in 2) ? 5) Use a LENGTH statement before the SET statement establish an appropriate length. Specify the following code and answer if the warning message disappeared? length Name $ 9