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.