You work for a company that owns several office buildings in your town. Your employers have decided to change all locks in their buildings from key to card access. Notify the tenants of each building about the change and tell them when it will occur. If all goes well, the process should take no more than a week at each building. As the locks are changed, keys will be collected and cards will be issued. Prepare a form letter that can be adapted to notify each tenant when the work will be done at his or her office.