Shade Tree Landscaping Company enters into a contract with Jill to landscape Jack's yard, using Fertile Nursery to supply trees and bushes. Maria owns the lot next to Jack's property. The landscaping is a gift from Jill to Jack, who is Jill's friend, but they are not related. What type of beneficiary is Jack? What type of beneficiary is Maria? What type of beneficiary is Fertile Nursery? If Shade Tree refuses to do the job, who can enforce the contract against it?