Sketch the single-sided and double-sided amplitude and phase spectra of the following signals:
(a) x1(t) = 10cos(4pit + pi 8) + 6sin(8pit + 3pi 4)
(b) x2(t) = 8cos(2pit + pi 3) + 4cos(6pit + pi 4)
(c) x3(t) = 2sin(4pit + pi 8) + 12sin(10pit)
(d) x4(t) = 2cos(7pit + pi 4) + 3sin(18pit + pi 2)
(e) x5(t) = 5sin(2pit) + 4cos(5pit + pi 4)
(f) x6(t) = 3cos(4pit + pi 8) + 4sin(10pit + pi 6)