A Non Pipelined Processor X has a clock rate of $250$ MHz and an average CPI of $5.$ Processor Y an

improved successor of X designe

d with a five stage pipeline. However due to pipeline registers and

clock skew effects; the clock rate is only $200$ MHz$.$ If a program containing $1000$ instructions is

executed on both the processors, what is the speed up of Y compared with that of X