1.15. The two-sided power spectral density, G₁(f) = 106 f2, of a waveform x(t) is shown in Figure P1.2. Gx(f) -10 kHz 10 kHz Figure P1.2 -10-6f2 (a) Find the normalized average power in x(t) over the frequency band from 0 to 10 kHz. (b) Find the normalized average power contained in the frequency band from 5 to 6 kHz.