Abby flies at 15 ft./s directly to a flower bed from its hive. The beast stays at a flower bed for 17 minutes and then flies directly back to the hive at 12 ft./s. It is away from the hive for a total of 20 minutes.

a) What is the total distance covered by Abby?
b) Calculate the average speed of Abby for the entire journey.
c) How far is the flower bed from the hive?
d) Determine the time taken to fly from the flower bed back to the hive.