$$ Compare two CPUs where:

o CPU A has a clock rate of $2\mathrm{.}5$ GHz$,$ CPI of $3,$ and performs $2\backslash$times $109$ operations using $60$ Watts.

o CPU B has a clock rate of $3\mathrm{.}2$ GHz$,$ CPI of $2\mathrm{.}8,$ and performs $1\mathrm{.}2\backslash$times $109$ operations using $75$ Watts.

$$ Calculate the CPU time for a program with $8$ million instructions and the overall ssj$\_$ops per Watt for both CPUs. Which CPU is more energy$-$efficient?