4. 15 points] Let relation R (A, B, C, D, E, F, G, H) satisfy the following functional dependencies: AB CH A BD C EG H DE F Which one of the following FDs is also guaranteed to be satisfied by R? A. B. C. D. CDE AF ACG DH ADE CH BED CF 5. [5 points] Let relation R (A, B, C, D, E) satisfy the following functional dependencies: AB C BCD CD E DE A AE B Which one of the following FDs is also guaranteed to be satisfied by R? A. B. C. D. BCD A BE