9 Starting from the three signals a(t), b(t), and c(t) shown in the following figure, you have to generate x(t) by pairwise convolution. Note that a(t) *a(t) is a valid pairwise convolution. Associate the signals ₁(t), 2(t), x3(t) and x(t) by identifying the correct pairs from a *a; a*b; a* c; b* b; b*a; b*c; c*c; c*a; c*b Need to mention the justification why? . [12] a(t) 14 14 1 1 x1(t) 1 x3(t) 1 b(t) 1 APF 14 #P c(t) 12(t) 1 x4(t) 1 1