Question: Answer all the questions. [110=10] (a) Consider the relation schemas, A(Id, Name, Age), B(Id, Name, Age) and C(Id, phone, area) with instances as A={(12, Arun,

Answer all the questions. [110=10] (a) Consider the relation schemas, A(Id, Name, Age), B(Id, Name, Age) and C(Id, phone, area) with instances as A={(12, Arun, 60), (15, Shreya, 24), (99, Rohit, 11) }, B={(15, Shreya, 24),(25, Hari, 40),(98, Rohit, 20),(99, Rohit, 11)} and C={(10,2200,02),(99,2100,01)}. How may tuples does the result of the following expression contains? (AB)A.Id>40C.Id

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