Worries about product service.

Traditionally, customers have had three specific worries about product service. What are they and what do you suppose could have contributed to these worries?
citation from book: Keller, P.K.K. L. (2016). Framework for Marketing Management. [VitalSource Bookshelf]. Retrieved from https://bookshelf.vitalsource.com/#/books/97801

please cite from the course book: Keller, P.K.K. L. (2016). Framework for Marketing Management. [VitalSource Bookshelf]. Retrieved from https://bookshelf.vitalsource.com/#/books/97801

Sample Solution