Answer: Primary , Observational
Explanation:
Primary data is the data that is collected through methods like survey, interview ,experimenting etc. in first handed form. This data is not derived from any other source.
Observational method is defined as the technique in which research is carried out through observation for knowing about object's characteristics and behavior.
According to the question, Mary is collecting primary data through watching and observing reaction of customers through observational method so that research regarding new packaging of salsa.