Greta Gardener owns a large greenhouse and wholesale flower business. She has employed the same caretaker to maintain and live on the grounds for more that 40 years. In her Will, Greta leave the greenhouse and flower business to the caretaker to control the property for his lifetime without interference. Greta states that upon the caretaker's death, the land and greenhouse will pass to her grandson, who plans to take over the business.

What type of estate does the caretaker have? What type of estate does the grandson have? What right does the grandson have during the caretaker's lifetime?What duty does the caretaker owe to the grandson during his estate?