4. (lOpts total)Consider relation p on variables A, B, C, and 9, p(A,B,C,D)={ (a,a,a,a), (a,b,b,b), (b,b,a,c)}. If we take a projection on variables A, B, and C from p (A, B, C, D) , is the projection IIABc(p) representable by a binary constraint network and Why? (5pts) Is p decomposable and Why? (5pts)

4. (10pts total) Consider relation 2 on variables A, B, C, and D, (A, B, C, D) = { (a, a, a, a),(a, b, b,b), (b, b, a, c)}. If we take a projection on variables A, B, and C from p (A,B,C,D), is the projection LaBc (p) representable by a binary constraint network and Why? (5pts) Is e decomposable and Why? (5pts) 4. (10pts total) Consider relation 2 on variables A, B, C, and D, (A, B, C, D) = { (a, a, a, a),(a, b, b,b), (b, b, a, c)}. If we take a projection on variables A, B, and C from p (A,B,C,D), is the projection LaBc (p) representable by a binary constraint network and Why? (5pts) Is e decomposable and Why? (5pts)