For the following systems concepts, fill in the cells of Table 1.2 with descriptors for possible events. Estimate event periods for the periodic events.

(a) Elevator control: this system controls all aspects of a bank of elevators that service a 50-story building in a busy city like Philadelphia.

(b) Automotive control: this on-board crash avoidance system uses data from a variety of sensors and makes decisions and affects behavior to avoid collision, or protect the occupants in the event of an imminent collision. The system might need to take control of the automobile from the driver.