`m a`
Looks good. So `f` needs to be a function that accepts an argument `w` (after the first stage, this will be `m a`), and an argument `b`, and applies `w` to `m` and to `b`. In other words, `f` should be:
`m a`
Looks good. So `f` needs to be a function that accepts an argument `w` (after the first stage, this will be `m a`), and an argument `b`, and applies `w` to `m` and to `b`. In other words, `f` should be: