An unknown gas, D, reacts with fluorine gas to form the compound DF4(g), as represented by the following equation. D(g)+2 F2(g)→DF4(g) A series of experimental trials were performed at 600∘C to determine the rate law expression for the reaction. Data from the trials are shown below.(a) A student claims that the reaction is first order with respect to F2(g). Do you agree or disagree? Justify your answer using the data above.(b) What is the initial rate of disappearance of F2(g) in trial 3? Justify your answer(c) A student claims that if element D is in group 18, then the molecular geometry of DF4(g) is square planar. Do you agree or disagree with the student? Justify your answer in terms of VSEPR theory.