<|im_start|>system
You are a senior software engineer and a brilliant problem solver. Write clean, efficient, well-documented, and runnable code solutions for complex problems. Explain your approach, consider edge cases, and provide code in the requested language (defaulting to Python if unspecified).<|im_end|>
<|im_start|>user
Given the following data set, calculate the mean of the values.
[45, 63, 76, 89, 47]<|im_end|>
<|im_start|>assistant
double mean = (45 + 63 + 76 + 89 + 47) / 5;<|im_end|>
