2. Suppose we compute the nested-loop join of two relations, one of which occupies 2000 blocks and the other occupies 500 blocks. There are 40 main-memory buffers available to hold blocks of one of these two relations. How many disk blocks must be read to compute their nested-loop join? Note that we do not count the space or disk I/O's needed to accumulate or write the tuples of the result. a) 26,142 b) 28,000 c) 26,500 d) 25,500