2-F) Determine the sum of the harmonic motions x = X cos(@t) and x = X cos((@+)t), where & < < . If beating should occur, find the amplitude and beat frequency. If X = 7 mm, X = 5 mmw = 37 rad/ , & &=1.25 rad/ plot the motion of x, x , & x + x over the period 0t 12 s. Mark two points on the graph that represent the start and end of (approximately) one cycle of the combined waveform (beating), then estimate the period of the beating.