List Operations

Problem Statement

Perform common list operations.

Background

Python lists support many operations:

• Append: lst.append(item)
• Extend: lst.extend([items])
• Insert: lst.insert(index, item)
• Remove: lst.remove(item)
• Pop: lst.pop(index)
• Slice: lst[start:end]

Your Task

Write a function list_stats(numbers) that computes statistics about a list of numbers.

Output Format

Return a dictionary with:

• "length": Number of elements
• "sum": Sum of all elements
• "min": Minimum value
• "max": Maximum value
• "first_three": First 3 elements as list
• "last_three": Last 3 elements as list
• "sorted": Sorted list (ascending)