Ergodic

Is the output of function of two ergodic processes ergodic?
How do you know if a process is ergodic?What is an ergodic function?Are all ergodic processes stationary?Is an iid sequence ergodic? How do you know...
What is a good example of an ergodic process?
An example of an ergodic systems would be the outcomes of a coin toss (heads/tails). If 100 people flip a coin once or 1 person flips a coin 100 times...