Please help with the below:

Consider a point on the Trans-Australian Highway, where two wombats live. Arrivals of cars at this point follow a Poisson distribution; the average rate of arrivals is 2 cars per 20 seconds. 9. One of these wombats requires 20 seconds to cross the highway. He's a tough old wombat. It takes 2 cars to kill him. A single car doesn't even slow him down. When he sets out to cross the highway, what is the probability he will survive? Four decimals 10. The other wombat is younger and faster. It takes him 10 seconds to cross the highway. But he is not as tough. It takes only one car to kill him. When he sets out to cross the highway, what is the probability he will survive? Four decimals 11. If both wom bats leave at the same time, what is the probability that exactly one of them survives? Four decimals 12. Continued. What is the probability that both of them survive? Four decimals 13. Continued. What is the probability that both of them perish? Four decimals