1. A signal given by x(t)=2cos(3pi t) is sampled at a frequency of 20 Hz, starting at time t=0. i. Is the signal sampled frequently enough? Why.
ii. Find the first six samples of the sequence.
111. Add delay to the sampled signal given in (b) by four samples. Draw the new one.

Asimple speed reducer is composed of 2 spur gears. the pinion gear has a pitch diameter of 0.75" and 36 teeth while the driven gear has a pitch diameter of 4.0" and 192 teeth. a)-what is the diametral pitch of each gear? b)-if an electric motor rotating ccw at 3000 rpm is coupled to the pinion, what is the rotational speed of the driven gear? c)-if the torque delivered to the pinion is 1 n-m, what is the torque on the driven gear? d)-what is the power transmitted by the gear train?