80 (97 of 893) 125% F a L 3.1. Sketch each of the following special digital sequences: a. 56(n) b. -28(n-5) c. -5u(n) d. 5u(n-2) 3.2. Calculate the first eight sample values and sketch each of the following sequences: a. x(n) = 0.5"u(n) b. x(n) = 5sin(0.2πn)u(n) c. x(n) - 5cos(0.1n+30°)u(n) d. x(n) = 5(0.75)" sin (0.1πn)u(n) 3.3. Sketch each of the following special digital sequences: a. 86(n) b. -3.58(n = 4) c. 4.5u(n) d. -6u(n-3) 3.4. Calculate the first eight sample values and sketch each of the following sequences: