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Write a Python function `surface_area_cylinder` that calculates the surface area of a cylinder given its radius and height. The formula for the surface area of a cylinder is:
\[ \text{Surface Area} = 2 \pi r^2 + 2 \pi r h \]
Where:
- \( r \) is the radius of the cylinder's base.
- \( h \) is the height of the cylinder.
#### Example Usage
```python [main.nopy]
surface_area_cylinder(10, 5) # Expected output: 942.4777960769379
surface_area_cylinder(4, 5) # Expected output: 226.1946710584651
surface_area_cylinder(4, 10) # Expected output: 351.8583772020568
```import math
def surface_area_cylinder(radius, height):
"""
Calculate the surface area of a cylinder.
Args:
radius (float): The radius of the cylinder's base.
height (float): The height of the cylinder.
Returns:
float: The surface area of the cylinder.
"""
# Placeholder for the solution
pass