The perimeter of a quadrilateral is 24cm. It is known that the first side is cm, the second side is smaller than the first side by cm, and the third side is equal to the sum of the first and second sides. Answer the following questions:

(1) Write the formulas representing the second, third and fourth side lengths directly (need to be simplified);

(2) When or, can you still get a quadrilateral? If yes, please explain the reasons; If not, please indicate what shape the graph is at this time. 1.(8 points) In order to show the society's respect for teachers, on the morning of Teachers' Day, taxi driver Xiao Wang picked up the teachers on the east-west expressway for free. If the east is positive and the west is negative, the taxi journey is as follows (km):+15, -4,-13,-10,-12, -3,-13,-60.

(1) When the last teacher arrived at the destination, what was the distance between Xiao Wang and the starting point?

(2) If the fuel consumption of the car is 0.4 liters/km, how many liters will this car consume this afternoon?