The goal of this exercise is to write functions in the editor to the left that pass test cases for the functions shown below. Whenever you are ready to run the tests, hit the button above the editor. To see the specification for a function you are supposed to write, click a button in the test panel. Once you have written the function with the right name, the button will indicate whether the test cases are all passing (green, with a ✅) or some are failing (red, with an ❌) and clicking the button will show the results of the individual test cases.

Put definitions here.

Revisions: