Question $1(60$ points$).$ The program described below runs on a multiple issue processor with a $3$level CPU cache, a $\backslash (4\backslash$mathbf$\{$G H z$\}\backslash$left$(1\backslash$mathrm$\{$GHz$\}=10^\{\backslash$wedge$\}9\backslash$mathrm$\{$~Hz$\}\backslash$right$)\backslash )$ clock frequency, and the following performance metrics: $($IPC: instructions per cycle$)$

a$).(15$ pts$)$ What is the base CPU time of the program $($without consider the memory stall time$)?$

b$).(15$ pts$)$ What is the amount of time $($in second$)$ consumed by memory$-$stall clock cycles? Assume equal read$/$write miss penalty and negligible write buffer stalls. $($Hint: Memory stall cycles $=$ Memory accesses $*$ miss rate $*$ miss penalty$)$

c$).(15$ pts$)$ What is the total CPU time of the program $($in second$)?($Hint: CPU time $=($CPU execution cycles $+$ Memory stall cycles$)/$ clock rate$)$

d$).(15$ pts$)$ What percentage of CPU time was taken by memory stall cycles?