82 (99 of 893) 125% + 3.9. Assume that a DS processor with a sampling time interval of 0.01 second converts the following analog signals x(t) to a digital signal x(n); determine the digital sequence for each of the analog signals. a. x(t) b. x(t) c. x(t) = e−50u(t) = = 5sin(20πt)u(t) 10cos (40πt+30°)u(t) d. x(t) = 10e 100 sin(15πt)u(t) 3.10. Determine which of the following systems is a linear system. a. y(n) = 5x(n) + 2x²(n) b. y(n) = x(n-1)+4x(n) - c. y(n) = 4x³ (n - 1) - 2x(n) 3.11. Assume that a DS processor with a sampling time interval of 0.005 second converts each of the following analog signals x(t) to a digital signal x(n); determine the digital sequence for each of the analog signals. a. x(t) = e100 u(t) b. x(t) - 4sin (60πt)u(t) c. x(t) d. x(t) - 7.5cos(20πt +60°)u(t) 20e-2001 *sin(60πt)u(t)