Consider three signals: x a (t) = cos(t), x b (t) = sin(πt), and x c (t) = x a (t) + x b (t). (a) For signal x a (t), determine its fundamental period Ta as well as its power. (b) For signal x b (t),...

(a) For signal x_a(t), determine its fundamental period Ta as well as its power.

(b) For signal x_b(t), determine its fundamental period Tb as well as its power.

(c) Show that signal x_c(t) is not periodic. Determine the power of x_c(t).