Hero's challenge: cars at a stoplight there are five cars in line at a stoplight. each of these cars is a different color and different type of car. diego is driving the red car. ingrid is driving the sedan. the green car is immediately behind the white car. the minivan is third in line. rachel is driving the first car in line. anton is just behind the driver in the suv. yuna is driving the green car. the driver in the yellow car is just in front of the convertible. rachel is just in front of the blue car. the sedan is white. one of the cars is a pickup truck. who is driving the pickup truck?

Summary of the problem: 
Diego=Red
 Ingrid=Sedan
 White then Green
 Rachel then 2 then Minivan 
 SUV then Anton
 Yuna = Green
 Yellow then Convertible
 Rachel then Blue
 Sedan=white 
 Now begin to combine in order:
 1. Rachel
 2 Blue 
 3 Minivan
 Since IngridSedanWhite is followed by YunaGreen, these do not fit as 1,2 or 3 so they must be 4 and 5
 4 IngridSedanWhite
 5 YunaGreen 
 The only place yellow then convertible will fit is in 1 and 2. So:
 1. RachelYellow
 2 ConvertibleBlue
 3 Minivan
 4 IngridSedanWhite
 5 YunaGreen 
 The SUV has to be 1 or 5, but Anton is behind it so the SUV must be #1. So: 
 1. RachelSUVYellow
 2 AntonConvertibleBlue
 3 Minivan
 4 IngridSedanWhite
 5 YunaGreen 
 The only color missing is Red so Diego must be driving the minivan:
 1. RachelSUVYellow
 2 AntonConvertibleBlue
 3 DiegoMinivanRed
 4 IngridSedanWhite
 5 YunaGreen 
 This leaves Yuna to be driving the green pickup truck.

What can we do about it