Plz help

Billy owns a bike shop in a coastal California town. His shop sells and repairs bikes. Travis, one of Billy's employees was repairing a bike with one of those pesky intermittent problems that would never occur when the repair technician was around. The customer said that the gears periodically would not shift properly. Travis took the bike out for a test ride hoping to replicate the problem. The problem did not appear. Because it was approaching noon, Travis decided to ride the bike home to have lunch. On the way back to the shop, Travis hit a pothole and wrecked the bike. Discuss the ALL of the liability during this entire scenario of Travis and Billy's bike shop for the injuries to the bike. When the customer dropped off the bike what is type of arrangement is this? Whose benefit was this originally for? Has this changed? When Travis wrecked the bike, what type of arrangement was there? How did this affect this situation? Who is liable for the bike? When Travis wrecked the bike, what is the term for what he was doing