In any case, now you know what's going on with the `Closure`s, and you should be able to complete the missing pieces of the `eval` function in the code skeleton linked above.
-If you've completed all the (eight) missing parts correctly, then you should be able to compile the code skeleton, and use it as described in the comments at the start of the code.
+If you've completed all the missing parts correctly (there are six gaps for the previous stage of the homework, and two gaps for this stage), then you should be able to compile the code skeleton, and use it as described in the comments at the start of the code.
## Fuller interpreter