VIII.A$-$Processor has access to two level of memory. Level $1$ has an access time of $0\mathrm{.}01$us; Level $2$ has an access time of $0\mathrm{.}5$ us; calculate the average access time, if $65\%$ of the memory accesses are found in the level $1.$ What is the ideal memory access time for this system? $[5$ Marks$]$ Note: Assume that if a word to be accessed is in level $1,$ then the processor accesses it directly. If it is in level $2,$ then the word is first transferred to level $1$ and then accessed by the processor.