Evan is performing a marble experiment in math class. His teacher places an equal number of black, red, blue, and white marbles in a bag. Then, Evan randomly takes out a marble, records the result, and puts the marble back in the bag. Each of the first five times Evan takes out a marble, he gets a red marble.
What is the theoretical probability of Evan picking a red marble next time? Based on Evan's results, what is the experimental probability of Evan picking a red marble next time?