A unit wants to plant four kinds of trees in the courtyard among Toona sinensis, jujube, neem, cedar, ginkgo and peach. It is known that: (1) Toona sinensis, at least one kind of jujube tree is planted: (2) if you plant Chunshu, then plant cedar but not cedar: (3) if you plant jujube, plant cedar but not ginkgo.
impossible?
Do not plant peach trees.