i want a simple answer for this question please.

7. (15 points) A State Diagram for Car Racing The state diagram of the robot car example presented in class is given below. A robot car wants to travel far, quickly. The car has 3 states, Cool, Warm, Overheated, and 2 actions: Slow, Fast. Going faster gets double reward. 0.5 +1 1.0 Fast Slow -10 +1 0.5 Warm Slow Fast 0.5 +2 Cool 0.5 Overheated 1.0 +1 Reward +2 a) Explain the state diagram starting from the Cool state and the numbers on state transitions. b) Draw the racing search tree diagram