2. (Pb 1.4) Use time averaging to find the average normalized power in the following waveform: x(t) = 10 cos(10)+20 cos(201) a. First evaluate the fundamental frequency fo of x(t) and use it to find To. % 1 b. Then use the time averaging equation: P = x² (t)dt T Hint: use trigonometric identities to complete your integral 3. (Pb 1.5) Repeat problem #2 using the summation of spectral coefficients. In this case you are first finding the equation of the PSD in the frequency domain and then compute the normalized power in the time domain (see Lesson 2: "classification and properties of signals"). a. First find the |cn|: the complex Fourier Series coefficients. Hint: you only have values at two frequency locations (equation# 7-9) therefore, you only need to find the coefficients c₁ = c.1 and c2-c.2. The rest are zero (why?) b. Apply the equation #9 for PSD given in Lesson 2.