help me with this small activity

Jenna started a new firm, Alphexo, which specializes in providing architectural design services to medium- and even large-size business customers. Alphexo, which began as an idea at Jenna's kitchen table, quickly grew to a point where she must find an actual office location where she can run her business. Jenna read an advertisement for an exciting potential location in a new commercial development in the downtown area that has been recently re-gentrified. She made a telephone inquiry to Samuel, whose company is developing the property. Based on her conversation with Samuel, Jenna learned that the property would meet all of her needs in terms of size, a reception area, and even a small conference room. However, Samuel's firm would prefer to sell the property rather than lease it. Jenna and Samuel ended their call by agreeing to meet the next day for a property tour. As they walked through the nearly completed office space, Samuel highlighted the many features of the property, and then made a first offer of $400,000 for the property. Jenna had hoped to pay 10% less than this opening offer, but had been willing to pay up to 5% more. Answer the following.

1. How should Jenna respond to Samuel's offer?
2. What are her reservation value and ZOPA?
3. Would it have been better for Jenna to make the first offer?