Determine whether the following signals are energy signals, power signals, or neither.(a) x(t) = e-at u(t), a > 0(b) x[n] = 2ej3n

• A. (a) is power signal (b) is energy signal
• B. (a) and (b) are power signals
• C. (a) is energy signal (b) is power signal
• D. (a) and (b) are energy signals