Use appropriate formulas and show your work to manually decompose the signal f(t) = 5cos(2t) • cos(3t + π/4) into a linear combination (i. e., a sum of constant multiples) of sinusoidal functions, and determine the amplitude, frequency, and phase shift of each component after decomposition. note: each of the sinusoidal functions in your answer must be of the form a sin(bt + c) where a > 0, b > 0, while c can be positive, zero, or negative.