$5\mathrm{.}5\mathrm{.}1$ Each cache block consists of four $8-$byte words. Th$$ e total o$$ set is $5$ bits. Th$$ ree of those $5$ bits is the word o$$ set $($the o$$ set into an $8-$byte word$).$ Th$$ e remaining two bits are the block o$$ set. Two bits allows us to enumerate $2^2=4$ words$\mathrm{.}5\mathrm{.}5\mathrm{.}2$ Th$$ ere are $$ ve index bits. Th$$ is tells us there are $2^5=32$ lines in the cache