Use the data given below to answer the following question(s) .
The table below shows the car sales from the year 2002-2007.The forecaster assumes a smoothing constant of 0.8 and uses the exponential smoothing model to determine the forecast for the future. 
-Using the given data,determine the value of the root mean square error.
Definitions:
Denver Developmental Screening Test
A standardized test used to assess developmental problems in children from infancy through preschool.
Apgar Scoring System
A quick test performed on a newborn at 1 and 5 minutes after birth to assess the baby's heart rate, respiratory effort, muscle tone, reflex response, and color.
Standardized Growth Charts
Charts used by healthcare professionals to track a child's growth over time compared to national averages for height, weight, and head circumference.
Anterior Fontanelle
The soft spot on a baby’s head where the skull bones have yet to fuse, allowing for brain growth.
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