How SDN is different from a normal network setup?

Look at the far left lane in the picture. explain what the red car is doing and what it needs to do to travel safely.

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

language consists of basic components, and they are called a. 3; mental images, concepts, and speech b. 2; language acquisition and linguistic relativity c. 3; heuristics, algorithms, and analogies d. 4; phonemes, morphemes, syntax, and semantics e. 2; words and grammar