. - ,E Consider two 1D plane waves: 1p1(x,t) = 291(kx+3\"'t) and gbz(x, t) = 5.9'(k3\"+'"\"'t 3): 311' a) Write down the amplitude and the phase of each wave at x = E t = 3' b) Sketch the phasors of the two waves at x = 0,15 = 0 (in polar coordinates). c) Find 11:1 + $2 by adding their phasors