Given CPU base CPI $=1,$ clock rate $=4$GHz Miss rate$/$instruction $=2\%$ Main memory access time $=100$ns i$.$ Calculate the Effective CPI with $1$ level cache. ii$.$ Now add L$-2$ cache It has access time $=5$ns Global miss rate to main memory $=0\mathrm{.}5\%$ Calculate the Effective CPI