Consider the schema R(ABCD), the set of functional dependencies FA- BCD) and the decomposition (R1, R2)-(ABC, ABD) Questions 1. Are R1 and R2 in BCNF? Which dependencies are preserved by the decomposition? 2. If your answer to the previous question was "Both are in BCNF", how would you explain the following situation? An instance r of R contains a sin- gle tuple (frank, 100K, mary, rochester). In the decomposition (R1, R2), the instance r of R1 consists of the tuple (frank, 100K, mary) and the instance r2 of R2 consists of the tuple (frank, 100K, rochester). The connection between frank and 100K is represented twice, creating a redundancy and a possible update anomaly. BCNF is supposed to prevent this. Justify your answers. Use an extra section in your report to include your answers for this