1. (Pb 1.1)- Classify the following signals as energy signals and power signals. Find the normalized energy or normalized power in each case. a. x(t)=Acos(211ft) for - <t<+∞ b. x(t) c. x(t)= [Acos(211ft) for-To/2 ≤t ≤ To/2, where To =1/fo elsewhere A exp(-at) for t>0, a > 0 d. x(t) = cos(t)+5 cos(2t) elsewhere 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