Please choose the correct ending to complete the given sentence: BMX: The biker is cycling and jumping over the big ramps. The biker jumps in the ramp with his bike in front up. four bikers

Ending1: on different parts of the track bikes cross at the same time. Ending2: stand by the ramp talking and pointing. Ending3: with their bikes entering into a ramp are inside a factory. Ending4: raced and jumped over the ramps, the biker in white is leading in the race.

Answer format: ending1/ending2/ending3/ending4