1. Consider two relations, Ri and R2, given below. State if it is possible to perform the set union of these two relations, i.e., Ri U R2. If union is possible, please provide the resulting schema after union; if not, state your reasoning. R1 (firstname char (36), lastname char (36), birthdate date); R2 (firstname varchar (36), lastname varchar (36), age int) 2. Consider a relation R(A, B, C,D, E) with dependencies ABC ABC DE, E BCD. Then the relation R is in 3NF. State true or false with reasoning. Then the relation Ris