The ratio of trapezium's sides is 2:9:7:8, but the perimeter of the trapezium is 104 cm. Calculate the length of all sides of the trapezium.
 
Note: Write the side length in the same order as the ratio given.
 
The first side is  cm.
 
The second side is  cm.
 
The third side is  cm.
 
The fourth side is  cm.