Consider two different implementations, machine M$1$ and machine M$2,$ of the same instruction set architecture as described below.

Note that there are four types of instructions $($A$,$ B$,$ C and D$)$ in the instruction set.

$M1$: clock rate $=800MHz$; $CP{I}_A=1,CP{I}_B=2,CP{I}_C=3,CP{I}_D=4$

$M2$: clock rate $=700MHz$; $CP{I}_A=2,CP{I}_B=3,CP{I}_C=4,CP{I}_D=2$

Assume that the 'peak performance' is defined as the fastest rate that a machine can execute an instruction sequence chosen to maximize that rate. What are the peak performances of M$1$ and M$2$ expressed as instructions per second? Answer with MIPS.