What is the purpose of the PROMOTE action in CAS?

The table casuser.employees is partitioned onto 3 CAS worker nodes.
Which SAS program will correctly accumulate a total of the salary variable and store it in the variable totalSalary?

Which CAS action is used to merge two or more CAS tables based on common variables?

Which programming language is used for SQL programming in SAS CAS?

Given an array cars with an unknown number of elements, use a CASL function to complete the following program segment to complete the DO loop:
do i=1 to _________
;
print cars[i];
end;