On a Sunday night, there are four people on a bus. The bus has five stops left before it ends its route. Suppose each person will get off the bus at one of the stops, and will do so randomly 1a: How...

On a Sunday night, there are four people on a bus. The bus has five stops left before it ends its route. Suppose each person will get off the bus at one of the stops, and will do so randomly

1a:How many different ways could the people get off the bus?

1b:What is the probability that all four people get off the bus on the first stop?

1c:What is the probability that all four people get off the bus on the first stop?

1d:What is the probability that exactly three of the four people get off the bus on the same stop?