(you can find the append block by importing the "List utilities" library)

How many subsets does the empty set {} have?

0
1
2
4

What should subsets report in the base case?

A list containing a list with each item of the set.
A list containing a list with the first item of the set.
A list containing an empty list.
A list containing a list with randomly chosen items from the set.

How many subsets of {Apple, Orange, Banana} contain Apple?

1
4
6
8

☞ Having answered these questions, try to complete your subsets block before going on.