Simon's four phases of decision$-$making are intelligence, design, choice, and implementation. These phases are explained as follows:$$

Intelligence consists of gathering information by examining reality, then identifying and defining the problem. In this phase, problem ownership should also be established.$$

Design consists of determining alternatives and evaluating them. This phase also includes construction of a model.$$

The choice phase consists of selecting a tentative solution and testing its validity.$$

Implementation of the decision consists of putting the selected solution into effect.$$

Describe the steps you take when buying a car using Simon's four$-$phase model.$$