Last Monday, Anita and her parents were going to the market by an auto rickshaw. On her way while taking a left turn, they heard the horn of speeding truck towards the turn. Suddenly, the auto rickshaw driver stopped his vehicle by applying brake. Thus, by adopting the precautionary measure by blowing horn, the truck driver saved the lives.
(a) The loudness of horn depends on what factor?
(b) Mention the values displayed by both the drivers.