Use the sales data given below to determine: 
(a) the least squares trend line.
(b) the predicted value for 2002 sales.
(c) the MAD.
(d) the unadjusted forecasting MSE.
Definitions:
Openness To Experience
A personality trait characterized by a receptiveness to new ideas, creativity, curiosity, and a preference for variety and adventure.
Sensation And Perception
The processes by which we gather information through our sensory organs and interpret this information to understand our environment.
Memory And Cognition
The mental processes involved in the acquisition, storage, retrieval, and use of information.
Testosterone Levels
The concentration of the steroid hormone testosterone in the body, which plays key roles in male reproductive tissues, muscle mass, and the development of secondary sexual characteristics.
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