Consider two different processors, P$1$ and P$2,$ which implement the same instruction set

architecture. The instructions can be divided into four classes according to their CPI:

classes A$,$ B$,$ C$,$ and D$.$ P$1$ has a clock rate $($f$1)$ of $3\mathrm{.}5$ GHz and CPIs of $1,2,3,$ and

$2($associated with the given order of classes$),$ while P$2$ has a clock rate $($f$2)$ of $2\mathrm{.}5$ GHz

and CPIs of $3,2,1,$ and $1,$ respectively