Use Amdahl's law, compare the theoretical speedup of the following cases:

a) Moving the execution of an application with 60% serial, 40% parallel from 2 processing cores to 4 four processing cores(4 processors, each has four processing cores)

b) Moving the execution of an application with 40% serial, 60% parallel from 1 processing cores to 2 four processing cores

c) Moving the execution of an application with 30% serial, 70% parallel from 4 processing cores to 8 four processing cores

d) Moving the execution of an application with 25% serial, 75% parallel from 2 processing cores to 8 four processing cores