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# Hints
## 1. Create a new visitor
- Revisit the [concept "Objects"][concept-objects] to find out how to create an object with certain keys and values.
## 2. Revoke the ticket
- Use the assignment operator `=` to set the `ticketId` property of the visitor object to `null`.
- Return the visitor object afterwards.
## 3. Determine the ticket status
- Revisit the [concept "Conditionals"][concept-conditionals] to find out how conditionally return different values from the function.
- Use the bracket notation to access the value of the given `ticketId` in the object.
- Use the strict equality operator `===` to check for `null` or `undefined`.
## 4. Improve the ticket status response
- Retrieve the value for a given `ticketId` with bracket notation like in the previous task.
- No if-statement is needed to solve this task.
- Use the [nullish coalescing operator][mdn-nullish-coalescing] `??` instead.
## 5. Determine the version of terms and conditions
- Revisit the [concept "Objects"][concept-objects] for how to access nested values and start with writing down the expression for retrieving the version.
- Then use the [optional chaining][mdn-optional-chaining] operator to handle the case of the missing gtc object.
- No if-statement is needed to solve this task.
[concept-objects]: /tracks/javascript/concepts/objects
[concept-conditionals]: /tracks/javascript/concepts/conditionals
[mdn-strict-equality]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Strict_equality
[mdn-nullish-coalescing]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator
[mdn-optional-chaining]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining