Computer Y runs Application B with a cycle time of $2\mathrm{.}5$ GHz$.$

The instruction mix includes

$30\%$ simple math $(1$ CPI$),$

$15\%$ branching $(3$ CPI$),$

$25\%$ multiplication $(2$ CPI$),$ and

$30\%$ floating$-$point $(5$ CPI$).$

The application consists of $1\mathrm{.}2$ million instructions.

A: What is the average CPI

B: Calculate the CPU time on Computer Y$.$