Please answer the questions below :

An important part of managing quality is a basic understanding of variation in production process.

1a. Explain and provide one example of special cause of variation and common cause variation. (2 points)

1b. Provide one example to support your answer. (1 point)

2a. Explain why it could be problematic if common cause variation is mistakenly considered as special cause variation. (2 points)

2b. Provide one example to support your answer. (1 point)