A student claims that signals transmitted by wireless computer networks are more beneficial than signals transmitted by other devices. Which statement supports the student’s claim? The wireless computer networks transmit signals that human beings can sense directly.

Signals do not need digitalization for long-distance transmission.

The wireless signals can carry large amounts of data at high radio frequencies.

Signals are transmitted at lower radio frequencies to reduce loss of data.

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.