Answer:
After seeing a video of Stewart's soapbox race, Vivian wants to help him.
Stewart reluctantly agrees to allow Vivian to help maintain his racer.
Vivian begins to build her own soapbox racer for the next race.
Stewart is skeptical Vivian can build her own racer since he needed help to build his.
Vivian has the best soapbox racer and wins first prize at the race.
Step-by-step explanation:
The given passage narrates the events that led to Vivian building her own soapbox racer. The events in chronological order are as follows-
1. Vivian wants to help out her brother Stewart maintain his soapbox racer after seeing his video.
2. Stewart had to reluctantly allow her to help and taught her how to do simple repairs.
3. After a while, Vivian started building her own racer for the next race.
4. Stewart is skeptical of Vivian's racer, knowing that it was impossible to build one alone for he built his racer with the help of his dad.
5. Vivian has the best soapbox racer and won the race, defeating her brother Stewart.