Find the total CPI of a computer system using both one$-$level and two$-$level caching under the following assumptions:

$-$ base CPI: $1\mathrm{.}2($including primary cache hit time$)$

$-$ primary cache hit rate: $95\%$

$-$ chance of missing both primary and secondary cache: $1\%$

$-$ secondary cache hit time: $5$ns

$-$ Clock rate: $2$GHz

$-$ main memory access time: $80$ns