AP Statistics simulation question?

- Suppose a person is taking a 5 question True/False Quiz and makes random guesses for each question. What is the probability of correctly answering at least 3 out of 5 questions? (30 total trials) - A tennis player’s serve is good only 60% of the time. What is the probability that the player’s serve will be good at least 4 out of 7 times. Design a simulation and then run the simulation 20 times to estimate the probability. How would I do these problems?