Question: The above graph draws the speedup of a program when executed on different numbers of processors. Hence, the x - axis represents the number of

The above graph draws the speedup of a program when executed on different numbers of processors. Hence, the x-axis represents the number of processors and the y-axis represents the speedup or gain.
At which values of x (number of processors invoked), we observe the local maxima?
Why the gain reduces when we add one more processor to the local maxima?

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