please solve #$7$ and show answer $36-$bit physical address. direct$-$mapped cache, $256$KB total data size, $64-$byte data per block, no valid bit used $-$ Show sizes of labeled parts $($a$,$ b$,$ c$,$ d$)$ in the diagram. $($a$)$ bits $($b$)$ bits $($c$)$ bits $($d$)($shaded area$)$: bytes