Please answer the question r. Someone says it is an empty output but I do not think so? Can you explain it to me? What is the answer to it and why? Thank you!

B. Consider the following two relations: Relation r Relations B A C 10 15 a b R 5 8 b 10 25 6 3 c 25 a a b 10 5 show the results of the following relational algebraic operations. Give 0 as your answer if you think the operation makes no sense. However, if you believe an operation makes sense but no tuples should be returned, you should still draw the schema of the resulting table. r. Iler(r) n lla,c(s)