Mercury 3

Let’s spell out **“strawberry”** and count each **r**: 1. s 2. t 3. **r** ← 1st r 4. a 5. w 6. b 7. e 8. **r** ← 2nd r 9. **r** ← 3rd r 10. y There are **3** letter **r**’s in **“strawberry”**.

The error happens because `users` is `undefined` when `UserList` renders, and you're trying to call `.map()` on it. In your component: ```js function UserList({ users }) { return ( <ul> {users.map(user => <li key={user.id}>{user.name}</li>)} </ul> ); } ``` If the parent component doesn't pass `users`, or passes it as `undefined`, `users.map` will throw: ``` TypeError: Cannot read properties of undefined (reading 'map') ``` ## How to fix it You have a few good options: ### 1. Provide a default value ```js function UserList({ users = [] }) { return ( <ul> {users.map(user => <li key={user.id}>{user.name}</li>)} </ul> ); } ``` Now if `users` isn't pas…

The function works, but it has several issues around imports, error handling, retry logic, readability, and performance. Below is a breakdown and an improved version. ## Key issues 1. **Imports inside function** `import requests` and `import time` should be at the top of the module, not inside the function. 2. **Bare `except`** `except:` catches everything, including `KeyboardInterrupt` and `SystemExit`. Catch specific exceptions like `requests.RequestException` or `ValueError`. 3. **No use of `requests.Session()`** Creating a new connection for every request is inefficient. A session reuses the underlying connection pool. 4. **Manual status code check** `if r.status…