11. Here are three relations, R(a,b), S(a,b), and T(a.b). Their current values are R S a bl| la b a b 10 1010 Compute the result of the query: SELECT R.a, R.b, S.b, T.b FROM R, S, T Identify, in the list below, the true statement about whether or not a tuple appears in the output, and how many times it appears a (0,0,0,0) appears once b) (1,0,0,0) appears once c) (1,0,1,0) appears twice d) (0,1,1,0) does not appear