There are 6 streets to be named after 6 tree types Ash, Birch, Elm, Fir, Oak, and Pine.
A city planner randomly selects the street names from the list of 6 tree types
Compute the probability of each of the following events
Event A: The first four streets are Elm, Oak, Ash, and Pine, without regard to order
Event B: The first street is Oak, followed by Fir then Pine, and then Elm
Write your answers as fractions in simplest form