please i’m begging someone to solve these for me ..

The dotplot shows the number of days on which the train arrived late in 100 repetitions of the simulation

4. Explain what the dot at 7 represents.

5. Use the results of the simulation to estimate the probability that the train will arrive late on 3 or more of 20 days.

6. Based on the actual result of 3 late arrivals in 20 days and your answer to Question 5, is there convincing evidence that New Jersey Transit's claim is false? Explain your reasoning.