Question: Each memory block, either allocated or free, has a size that is a multiple of eight bytes. Thus, only the 2 9 higher order bits

Each memory block, either allocated or free, has a size that is a multiple of eight bytes. Thus, only the 29 higher order bits in the header and footer are needed to record block size, which includes the header and footer. The usage of the remaining 3 lower order bits is as follows:

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