A large number of consecutive IP addresses are available starting at 198.16.0.0. Suppose that four organizations: A, B, C, and D, request 4000, 2000, 4000, and 8000 addresses, respectively, and in that order.

For each of the blocks allocated for A and B only, give the (1) first IP address assigned, (2) the last IP address assigned, and (3) the mask in the w.x.y.z/s notation. It is required to allocate the block A at the base address 198.16.0.0, and the block for B is allocated right after Block A with zero gap.

Hint: round the block sizes to the nearest larger power of 2.

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