A file system can keep track of free blocks by using either a free block bitmap or a free block list. The system has a total of t blocks of size b bits, u of those blocks are used and each block number is stored using s bits. a Express size (in bits) of this device's free block bitmap using the given variables. b Express the size (in bits) of this system's free block list in terms of the given variables. Ignore the space consumed by pointers to free list continuation blocks.