Exercise 6.10.5: Select operations on relational databases. i About Consider a relational database R. C, and C2 are two conditions that could be used in a Select operation on R. (a) Prove that Select[C] followed by Select[C] yields the same results as Select[C] followed by Select[C] (b) How could the two operations performed in sequence (Select[C] followed by Select[cz]) be replaced by a single Select operation and achieve the same results