There are 8 streets to be named after 8 tree types.
Ash, Birch, Elm, Fir, Maple, Pine, Spruce, and Willow.
A city planner randomly selects the street names from the list of 8 tree types.
Compute the probability of each of the following events.

Event A: The first three streets are Ash, Elm, and Pine, without regard to order.

Event B: The first street is Willow, followed by Spruce and then Fir.

Write your answers as fractions in simplest form.