please explain in detail of the steps. thank you.

World Series. Are the teams that play in the World Series evenly matched? To win a World Series, a team must win four games. If the teams are evenly matched, we would expect the number of games played in the World Series to follow the distribution shown in the first two columns of the following table. The third column represents the actual number of games played in each World Series from 1930 to 2014. Do the data support the distribution that would exist if the teams are evenly matched and the outcome of each game is independent? Use the alpha = 0.05 level of significance. Number of Games Probability Observed Frequency 0.125 0.25 0.3125 0.3125 CHA