The following query involves three relations:

R(a, b) S(p, q) W(x, y)

We have the following statistics about the three tables:

T(R) = 2000 V(R, a) = 50 V(R, b)=20

T(S) = 4000 V(S, p) = 400 V(S, q) = 100

T(W) = 1000 V(W, x) = 200 V(W, y) = 100

Now consider the following query plan:

1)U1 = (S join W) on _{S.q = W.x}

2)U2 = (R join U1 ) on _{R.b = U1.y}

3)U3 = Select _{a = 42} (U2)

4)U4 = Project _{b,q} (U3)

What are the estimated statistics (T() and V()) of the result of each relational operation given above