Determine whether or not each of the following discrete-time signals is periodic. if the signal is periodic, determine its fundamental period. (a) x[n]=sin(8π/2 n+1), (b) x[n]=cos(r/8-π), (c) x[n]=cos(π/8 n²), (d) x[n]=cos(π/2 n) cos(π/4 n), (e) x[n]=2cos(π/4 n)+sin(π/8 n)-2cos(π/2 n+π/6)

Acar traveling at a constant speed of 22.0 m/s passes a trooper hidden behind a billboard. one second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.50 m/s2. how long does it take the trooper to overtake the speeding car? solve this problem by a graphical method. on the same graph, plot position versus time for the car and the trooper.