A company has the data shown in the chart below concerning its forecast performance over the past four time periods. 
Complete the chart and compute the MAD.
Definitions:
Volunteer Activities
Actions undertaken by an individual or group freely and without compensation for the benefit of the community or a particular cause.
Tax Payment
The process of paying financial charges or levies imposed by a government on its citizens to fund public expenditures.
Personal Values
Core beliefs or standards that individuals hold, guiding their behavior and decision-making processes.
Scientific Observation
The act of noticing and recording phenomena or data in a systematic way as part of a scientific study.
Q1: The symbol indicates what type of activity
Q7: Give an example of an extensive property.
Q15: If a make-to-stock manufacturing firm with highly
Q16: All of the following represent external failure
Q19: Jones Company had sales of $100,000 last
Q21: The process of "stapling yourself to an
Q53: A microbiologist decides to use a nutrient
Q98: Identify the following as a physical or
Q109: Define pure substance.
Q147: Do the indicated arithmetic and give the