Final answer:
Generally, the landlord, Lew, is responsible for the maintenance of the smoke alarm unless the lease specifies otherwise. However, communication between the tenant and landlord is crucial for a prompt resolution.
Step-by-step explanation:
When it comes to maintaining a smoke alarm in a leased property, the responsibility usually falls on the landlord, unless stated otherwise in the lease agreement. In general, it is the landlord's duty to ensure that the rental property meets safety standards and is habitable. Maintenance of smoke detectors typically falls under this requirement. Therefore, in the scenario where Jackson finds that the smoke alarm does not sound after he burned a piece of toast, it would be Lew, the landlord, who is responsible for its maintenance. However, if the lease specifies that the tenant, Jackson, is responsible for such maintenance, then it would be his responsibility. Communication between Jackson and Lew is key to resolving the issue, and it should be addressed promptly due to the importance of having a functioning smoke alarm for safety reasons.