Refer to the triangle wave shown below and answer the following three questions. v(t) (cos at cos cos 5at…) WO f3 1. Find the harmonics up to fifth fi, f, and f). 62 v- 3vo 13. 2. Calculate the voltages of the above harmonics (Vi, V’s, and 3. Sketch the frequency spectrum for the triangle wave using the result of the question 1 and 2. Indicate the voltages and frequencies of each harmonics, lor fs 312.