Given relation s(a, b, c), write an SQL statement to generate a histogram showing the sum of c values versus a, dividing a into 20 equal-sized partitions (i.e., where each partition contains 5 percent of the tuples in s, sorted by a).

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Let an be the number of bit strings of length n that do not contain three consecutive 0s. Identify the initial conditions for the recurrence relation in the previous question. (You must provide an answer before moving to the next part.) a0 = 1, a1 = 2, and a2 = 4 a0 = 1, a1 = 2, and a2 = 3 a0 = 2, a1 = 1, and a2 = 4 a0 = 2, a1 = 1, and a2 = 3