5. Consider a relation Temp/regionID, name, high, low) that records historical high and low temperatures for various regions. Regions have names, but they are identified by regionID, which is a key. Consider the following query, which uses the linear notation introduced at the end of the relational algebra videos. Ti(rID, h) = TiregionID,high(Temp) T2(r1D, 1) = Tregionid,low (Temp) T3(regionlD) = Trid(T n