$2)$ A memory has $65,536$ words of $32$ bits each. What is the number of address lines needed to access this memory? $(4$ points$)$

$3)$ Consider a Level $1$ cache with a $\backslash (0\mathrm{.}12\backslash$mu $\backslash$mathrm$\{$~s$\}\backslash )$ access time and Level $2$ memory with a $\backslash (1\mathrm{.}3\backslash$mu $\backslash$mathrm$\{$~s$\}\backslash )$ access time, at a hit rate of $\backslash (75\backslash \%\backslash ),$ what is the average memory access time? $(4$ points$)$