Assume that an access time to main memory is $100ns$ and a clock rate is $4CHz.$ The miss rate per instruction at the primary cache is $10\%,$ and the local miss rate is $5\%$ at the secondary cache. Hit times for L$1$ and L$2$ caches are $0\mathrm{.}25$ns and $5$ns$.$ Respectively.

If there is no memory reference instruction, calculate the AMAT and total CPI for this processor when a base CPI is $1\mathrm{.}0$ without any memory stalls