Compare two different implementations, P$1$ and P$2,$ of the same instruction set. PI has a clock rate of $400MHz,$ and $P2$ has a clock rate of $200MHz.$ The average number of cycles for each instruction class on $P1$ and $P2$ is given in the following table:

$\backslash$table$[[$Instruction sel,CPI $($P$1),$CPI $($P$2),$CI usage,C$2$ usage,C$3$ usage$],[$A$,4,2,30\%,30\%,50\%$