Kiyoshigaang points to the direct answer to the question. On a GB-style analysis (Government and Binding), who is in spec of CP and will is in C of CP; both move to those positions from lower in the tree.
But the question references T of TP. Thus the question seems to be located in the generative tradition after about 1995, since the generative tradition did not start acknowledging TP until about that time. Producing an analysis that can be agreed upon becomes more difficult in this regard, since as the generative tradition has progressed, more and more functional categories have been added, e.g. AgrP, FocP, TopP, etc. A "correct" analysis and direct answer to the question is therefore increasingly debatable.
This site is inundated by this type of parse tree question. In my view, the questions bear witness to a major problem with the state of mainstream Chomskyan syntax and modern syntax courses in linguistics in general. Students are being required to produce parses of sentences using an increasingly complex system; they are therefore understandably frustrated and thus seeking help where they might find it. But due to the complexity of the system, it is often difficult to produce coherent answers to the questions. The experts often disagree.
This is of course not the answer that the question is seeking. Producing a clear answer would, though, be difficult, and drawing a modern X-bar-style tree that acknowledges TP is laborious. Perhaps this answer will, however, help generate skepticism about the value of producing such parses to begin with, in a system of syntax that is (in my view) overly complex.