2.30 Use the superposition, scale-change, and time-delay theorems along with the transform pairs II (t) sinc(f), sinc(t) ↔ II(ƒ), A(t) → sinc² (f), and sinc² (t) ← A (f) to find Fourier transforms of the following: (a) x₁ (t) = II x1 (t) = 11 ( 1/1) (b) x2 (t) = 2 sinc[2 (t − 1)] (c) x 3 (t) = A (17/² ) 8 (d) x4 (t) = sinc² (173) 4 - (e) x (t) = 5 sinc [2 (t − 1)] +5 sinc [2 (t + 1)] (f) x6 (1) = 2A (17) + 2A (2) 8