$(20$ points$)$ Consider three different processors $P1,P2,$ and $P3$ executing the same

instruction set. $P1$ has a $2\mathrm{.}3GHz$ clock rate and an average CPI $($cycles per instruction$)$ of

$1\mathrm{.}9.$ P$2$ has a $2\mathrm{.}9GHz$ clock rate and an average $\frac{C}{P}$I of $1\mathrm{.}5.$ P$3$ has a $3\mathrm{.}2GHz$ clock rate

and has an average CPI of $2\mathrm{.}4.$