Jesse Spires was employed as a welder by Johnson Welded Products, Inc. During his lunch break, Spires headed to a friend's house for lunch, driving his own pickup truck, when he collided with Donald Siegenthaler, who was riding a motorcycle. The collision, which was the result of Spires's negligence, caused injury to Siegenthaler.

Siegenthaler sued Johnson Welded Products, alleging that Spires was an agent of Johnson Welded Products at the time of the accident and that Johnson Welded Products was vicariously liable under the doctrine of respondeat superior. Johnson Welded Products argued that Spires was on personal business and a frolic and detour when he caused the accident.

Questions:

1. According to the book, what is the doctrine of respondeat superior?
2. According to the book, what does the phrase "frolic and detour" mean?
3. Given the facts of the case, do you think Johnson Welded Products should be held vicariously liable for the injuries suffered by Siegenthaler?

Explain your answer