Question $4$: make sure to answer it correctly!

Given a $32-$bit address, the following bits of the address are used to access the cache of direct map type:

Tag: $31-8$ Index: $7-3$ Offset: $3-0$

a$.$ What is the cache block size in bytes?

$=\sqrt[\phantom{2}]{16},2$ boytes

b$.$ How many blocks does the cache have?

$32b$ locks

c$.$ What is the ratio between total bits required for such a cache implementation over the data storage bits?