Compute the average power and the energy in the step sequence s[n] = 2u[n], where u[n] is the unit-step sequence. Hence, justify whether the given signal is an energy signal or a power signal.
A) Average power = 0.5, Energy = [infinity], Power signal
B) Average power = [infinity], Energy = [infinity], Power signal
C) Average power = 0.5, Energy = [infinity], Energy signal
D) Average power = [infinity], Energy = [infinity], Energy signal