Comparing linear and exponential function

At approximately what point does the value of $f(x)$ exceed the value of $g(x)$ if $f(x) = 2(4)^{\frac{x}{20}}$ and $g(x) = 0.5x$? Justify your answer with a graph.

1. Make a general observation.
   
2. Create a table of values.
   
3. Graph both functions on the same coordinate plane.
   
4. Identify the approximate point where $f(x)$ is greater than $g(x)$.